diff --git a/composer.json b/composer.json
index 2458124..114a577 100644
--- a/composer.json
+++ b/composer.json
@@ -6,18 +6,15 @@
         "dev2": "php cli/server.php 2 8080 --debug & php cli/udp-ws-bridge.php & php cli/udp-ws-bridge.php 8082",
         "dev2c": "php cli/server.php 2 8080 --debug & php cli/udp-ws-bridge.php & sleep 2 && php cli/client.php acode 8080",
         "dev3c": "php cli/server.php 3 8080 --debug & php cli/udp-ws-bridge.php & sleep 1 ; php cli/client.php acode 8080 & php cli/client.php acode 8080",
-        "test": [
-            "@putenv TEST_ENVIRONMENT=true",
-            "@unit"
-        ],
         "coverage": [
             "@putenv XDEBUG_MODE=coverage",
             "@unit --coverage-html www/coverage"
         ],
         "check": [
+            "@putenv PROJECT_CHECK=true",
             "@composer dumpautoload --optimize --classmap-authoritative",
             "@stan",
-            "@test"
+            "@unit"
         ]
     },
     "require": {
diff --git a/server/src/Core/Game.php b/server/src/Core/Game.php
index 9ac60a2..62c4257 100644
--- a/server/src/Core/Game.php
+++ b/server/src/Core/Game.php
@@ -20,6 +20,7 @@
 use cs\Event\RoundStartEvent;
 use cs\Event\SoundEvent;
 use cs\Event\ThrowEvent;
+use cs\Interface\ForOneRoundMax;
 use cs\Map\Map;
 
 class Game
@@ -409,6 +410,11 @@ private function halfTimeSwapTeams(): void
     private function roundReset(bool $firstRound, RoundEndEvent $roundEndEvent): void
     {
         $this->world->roundReset();
+        foreach ($this->events as $event) {
+            if ($event instanceof ForOneRoundMax) {
+                $this->removeEvent($event->customId);
+            }
+        }
         $randomizeSpawn = $this->properties->randomize_spawn_position;
         foreach ($this->players as $player) {
             if (!$firstRound) {
diff --git a/server/src/Core/Util.php b/server/src/Core/Util.php
index 5d8fa00..d29f39c 100644
--- a/server/src/Core/Util.php
+++ b/server/src/Core/Util.php
@@ -52,10 +52,15 @@ public static function smallestDeltaAngle(int $start, int $target): int
     }
 
     /**
-     * @return null[]|float[] world angles [horizontal, vertical] in degree
+     * @return array{?float,float} world angles [horizontal, vertical] in degree
      */
     public static function worldAngle(Point $point, Point $origin = new Point()): array
     {
+        $d = Util::distanceSquared($origin, $point);
+        if ($d === 0) {
+            return [null, 0.0];
+        }
+
         $cx = $point->x - $origin->x;
         $cy = $point->y - $origin->y;
         $cz = $point->z - $origin->z;
@@ -65,10 +70,6 @@ public static function worldAngle(Point $point, Point $origin = new Point()): ar
             $h = fmod(450 - rad2deg(atan2($cz, $cx)), 360.0);
         }
 
-        $d = Util::distanceSquared($origin, $point);
-        if ($d === 0) {
-            return [$h, null];
-        }
         $v = rad2deg(asin(abs($cy) / sqrt($d)));
         return [$h, (($cy) >= 0 ? $v : -$v)];
     }
diff --git a/server/src/Core/World.php b/server/src/Core/World.php
index 8da738e..3335d96 100644
--- a/server/src/Core/World.php
+++ b/server/src/Core/World.php
@@ -508,7 +508,9 @@ public function bulletHit(Hittable $hit, Bullet $bullet, bool $wasHeadshot): voi
         $soundEvent->addExtra('shooter', $attacker);
 
         $this->makeSound($soundEvent);
-        $this->game->getScore()->getPlayerStat($attacker)->addDamage($damage);
+        if ($hit->getPlayer() && $hit->getPlayer()->isPlayingOnAttackerSide() !== $bullet->isOriginPlayerAttackerSide()) {
+            $this->game->getScore()->getPlayerStat($attacker)->addDamage($damage);
+        }
     }
 
     public function tryPlantBomb(Player $player): void
diff --git a/server/src/Event/DropEvent.php b/server/src/Event/DropEvent.php
index 639a46d..0c2afcd 100644
--- a/server/src/Event/DropEvent.php
+++ b/server/src/Event/DropEvent.php
@@ -7,12 +7,12 @@
 use cs\Core\Item;
 use cs\Core\Player;
 use cs\Core\Point;
-use cs\Core\Setting;
 use cs\Core\Util;
 use cs\Core\World;
 use cs\Enum\SoundType;
+use cs\Interface\ForOneRoundMax;
 
-class DropEvent extends Event
+class DropEvent extends Event implements ForOneRoundMax
 {
 
     private string $id;
diff --git a/server/src/HitGeometry/BallCollider.php b/server/src/HitGeometry/BallCollider.php
index 8ed9bb3..46abec8 100644
--- a/server/src/HitGeometry/BallCollider.php
+++ b/server/src/HitGeometry/BallCollider.php
@@ -74,8 +74,7 @@ public function hasCollision(Point $point, float $angleHorizontal, float $angleV
         $candidate = new Point();
         if ($this->lastExtremePosition && Util::distanceSquared($this->lastExtremePosition, $point) > 9) {
             [$angleH, $angleV] = Util::worldAngle($point, $this->lastExtremePosition);
-            $angleH = $angleH ?? $angleHorizontal;
-            $angleV = $angleV ?? $angleVertical;
+            $angleH = $angleH ?? 0;
         } else {
             $angleH = $angleHorizontal;
             $angleV = $angleVertical;
diff --git a/server/src/Interface/ForOneRoundMax.php b/server/src/Interface/ForOneRoundMax.php
new file mode 100644
index 0000000..7290acb
--- /dev/null
+++ b/server/src/Interface/ForOneRoundMax.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace cs\Interface;
+
+interface ForOneRoundMax
+{
+
+}
diff --git a/test/bootstrap.php b/test/bootstrap.php
index bc09085..afaeedb 100644
--- a/test/bootstrap.php
+++ b/test/bootstrap.php
@@ -6,11 +6,28 @@
 
 use cs\Core\Game;
 use cs\Core\Point;
+use cs\Event\AttackResult;
 use PHPUnit\Framework\TestCase;
 
 class BaseTest extends TestCase
 {
 
+    public function assertPlayerHit(?AttackResult $attackResult): AttackResult
+    {
+        $this->assertNotNull($attackResult, 'No attack result');
+        $this->assertTrue($attackResult->somePlayersWasHit(), 'No players were hit');
+
+        return $attackResult;
+    }
+
+    public function assertPlayerNotHit(?AttackResult $attackResult): AttackResult
+    {
+        $this->assertNotNull($attackResult, 'No attack result');
+        $this->assertFalse($attackResult->somePlayersWasHit(), 'Some players were hit');
+
+        return $attackResult;
+    }
+
     public function assertPositionSame(Point $expected, Point $actual, string $extraMsg = ''): void
     {
         $this->assertTrue($expected->equals($actual), "Expected: {$expected} <> {$actual} actual." . $extraMsg);
diff --git a/test/og/BaseTestCase.php b/test/og/BaseTestCase.php
index f595436..0c07ff0 100644
--- a/test/og/BaseTestCase.php
+++ b/test/og/BaseTestCase.php
@@ -154,11 +154,14 @@ protected function playPlayer(TestGame $game, array $commands, int $playerId = 1
                 return;
             }
             if (!isset($commands[$i])) {
-                throw new InvalidArgumentException("No command defined for tick '{$i}' or too many tickMax in Game");
+                throw new InvalidArgumentException("No command defined for tick '{$i}' or too many tickMax (no endGame?)");
             }
             if (false === $commands[$i]) {
-                $game->setTickMax(0);
                 $i++;
+                if (count($commands) > $i) {
+                    throw new InvalidArgumentException("Early exit from iteration '{$i}'");
+                }
+                $game->setTickMax(0);
                 return;
             }
             if (is_int($commands[$i])) {
diff --git a/test/og/Inventory/SimpleInventoryTest.php b/test/og/Inventory/SimpleInventoryTest.php
index e40e51d..b47df57 100644
--- a/test/og/Inventory/SimpleInventoryTest.php
+++ b/test/og/Inventory/SimpleInventoryTest.php
@@ -242,7 +242,7 @@ public function testDropBoxCollisionNotPickUp(): void
         $box = new Box(new Point(500, 0, 500), 800, 600, 200);
         $game->getWorld()->addBox($box);
 
-        $this->playPlayerDebug($game, [
+        $this->playPlayer($game, [
             fn(Player $p) => $p->setPosition($box->getBase()->clone()->addZ(-($player->getBoundingRadius() + 10))->addX(200)),
             fn(Player $p) => $p->moveForward(),
             fn(Player $p) => $p->equipSecondaryWeapon(),
diff --git a/test/og/Shooting/BacktrackTest.php b/test/og/Shooting/BacktrackTest.php
index dade084..a0f6c62 100644
--- a/test/og/Shooting/BacktrackTest.php
+++ b/test/og/Shooting/BacktrackTest.php
@@ -54,10 +54,7 @@ public function testNoBacktrackKill(): void
             }
 
             if ($i === 0) {
-                $result = $state->getPlayer(1)->attack();
-                $this->assertNotNull($result);
-
-                $this->assertTrue($result->somePlayersWasHit());
+                $result = $this->assertPlayerHit($state->getPlayer(1)->attack());
                 $this->assertFalse($state->getPlayer(2)->isAlive());
                 $game->quit(GameOverReason::TIE);
             }
@@ -78,10 +75,7 @@ public function test1BacktrackDisable(): void
 
             $state->getPlayer(2)->moveRight();
             if ($i === 1) {
-                $result = $state->getPlayer(1)->attack();
-                $this->assertNotNull($result);
-
-                $this->assertFalse($result->somePlayersWasHit());
+                $result = $this->assertPlayerNotHit($state->getPlayer(1)->attack());
                 $this->assertTrue($state->getPlayer(2)->isAlive());
                 $game->quit(GameOverReason::TIE);
             }
@@ -103,10 +97,7 @@ public function test1BacktrackEnableOneTick(): void
 
             $state->getPlayer(2)->moveRight();
             if ($i === 1) {
-                $result = $state->getPlayer(1)->attack();
-                $this->assertNotNull($result);
-
-                $this->assertTrue($result->somePlayersWasHit());
+                $result = $this->assertPlayerHit($state->getPlayer(1)->attack());
                 $this->assertFalse($state->getPlayer(2)->isAlive());
                 $game->quit(GameOverReason::TIE);
             }
@@ -128,10 +119,7 @@ public function test1BacktrackEnableTwoTick(): void
 
             $state->getPlayer(2)->moveRight();
             if ($i === 2) {
-                $result = $state->getPlayer(1)->attack();
-                $this->assertNotNull($result);
-
-                $this->assertTrue($result->somePlayersWasHit());
+                $result =  $this->assertPlayerHit($state->getPlayer(1)->attack());
                 $this->assertFalse($state->getPlayer(2)->isAlive());
                 $game->quit(GameOverReason::TIE);
             }
@@ -153,10 +141,7 @@ public function test1BacktrackEnableTwoTickNoHitWhenPlayerThreeTickAwayFromHit()
 
             $state->getPlayer(2)->moveRight();
             if ($i === 3) {
-                $result = $state->getPlayer(1)->attack();
-                $this->assertNotNull($result);
-
-                $this->assertFalse($result->somePlayersWasHit());
+                $result = $this->assertPlayerNotHit($state->getPlayer(1)->attack());
                 $this->assertTrue($state->getPlayer(2)->isAlive());
                 $game->quit(GameOverReason::TIE);
             }
@@ -178,10 +163,7 @@ public function test1BacktrackEnableFourTick(): void
 
             $state->getPlayer(2)->moveRight();
             if ($i === 3) {
-                $result = $state->getPlayer(1)->attack();
-                $this->assertNotNull($result);
-
-                $this->assertTrue($result->somePlayersWasHit());
+                $result = $this->assertPlayerHit($state->getPlayer(1)->attack());
                 $this->assertFalse($state->getPlayer(2)->isAlive());
                 $game->quit(GameOverReason::TIE);
             }
diff --git a/test/og/TestGame.php b/test/og/TestGame.php
index 72e09b2..b89d086 100644
--- a/test/og/TestGame.php
+++ b/test/og/TestGame.php
@@ -4,6 +4,7 @@
 
 use Closure;
 use cs\Core\Game;
+use cs\Core\GameException;
 use cs\Core\Setting;
 use cs\Net\Protocol\TextProtocol;
 
@@ -27,6 +28,9 @@ public function setTickMax(int $tickMax): void
     public function start(bool $debug = false): void
     {
         if ($debug) {
+            if (getenv('PROJECT_CHECK') === 'true') {
+                throw new GameException('Debug flag detected, see oldest item of stacktrace');
+            }
             $protocol = new TextProtocol();
             $this->gameStates[0] = json_decode($protocol->serializeGameState($this));
         }
diff --git a/test/og/Unit/UtilTest.php b/test/og/Unit/UtilTest.php
index 8891157..17bafcc 100644
--- a/test/og/Unit/UtilTest.php
+++ b/test/og/Unit/UtilTest.php
@@ -61,6 +61,14 @@ public function testCubeDiagonalMovement(): void
         $this->assertSame([10, -47, 14], Util::movementXYZ(35, -70, 50));
     }
 
+    public function testMovementXYZWithFullVertical(): void
+    {
+        foreach (range(0, 36) as $i) {
+            $this->assertSame([0, 100, 0], Util::movementXYZ($i * 10, 90, 100), "{$i}");
+            $this->assertSame([0, -100, 0], Util::movementXYZ($i * 10, -90, 100), "{$i}");
+        }
+    }
+
     public function testRotatePointY(): void
     {
         $data = [
@@ -189,6 +197,11 @@ protected function _testWorldAngleUsingMovement(Point $start, float $h, float $v
 
     public function testWorldAngle(): void
     {
+        $this->assertSame([0.0, 0.0], Util::worldAngle(new Point(10, 10, 20), new Point(10, 10, 10)));
+        $this->assertSame([180.0, 0.0], Util::worldAngle(new Point(10, 10, 20), new Point(10, 10, 30)));
+        $this->assertSame([90.0, 0.0], Util::worldAngle(new Point(11, 10, 20), new Point(10, 10, 20)));
+        $this->assertSame([270.0, 0.0], Util::worldAngle(new Point(9, 10, 20), new Point(10, 10, 20)));
+
         $this->assertSame([null, -90.0], Util::worldAngle(new Point(), new Point(0, 10, 0)));
         $this->assertSame([null, 90.0], Util::worldAngle(new Point(), new Point(0, -10, 0)));
         $this->assertSame([Util::normalizeAngle(-90.0), 0.0], Util::worldAngle(new Point(), new Point(10, 0, 0)));
@@ -196,14 +209,12 @@ public function testWorldAngle(): void
         $this->assertSame([0.0, 0.0], Util::worldAngle(new Point(), new Point(0, 0, -10)));
         $this->assertNotSame([180.0, -90.0], Util::worldAngle(new Point(829, 773, 10), new Point(829, 940, 145)));
         $this->assertSame([90.0, 0.0], Util::worldAngle(new Point(10, 0, 0)));
-        $this->assertSame([null, null], Util::worldAngle(new Point(10, 2, 6), new Point(10, 2, 6)));
         $this->assertSame([null, 90.0], Util::worldAngle(new Point(10, 4, 6), new Point(10, 2, 6)));
 
         $this->assertSame([90.0, 0.0], Util::worldAngle(new Point(10, 0, 0)));
         $this->assertSame([0.0, 0.0], Util::worldAngle(new Point(0, 0, 10)));
         $this->assertSame([45.0, 0.0], Util::worldAngle(new Point(5, 0, 5)));
-        $this->assertSame([null, null], Util::worldAngle(new Point(10, 2, 6), new Point(10, 2, 6)));
-        $this->assertSame([null, 90.0], Util::worldAngle(new Point(10, 4, 6), new Point(10, 2, 6)));
+        $this->assertSame([null, 0.0], Util::worldAngle(new Point(10, 2, 6), new Point(10, 2, 6)));
     }
 
     public function testLerp(): void
diff --git a/www/assets/js/Game.js b/www/assets/js/Game.js
index 1ddfef0..0a19390 100644
--- a/www/assets/js/Game.js
+++ b/www/assets/js/Game.js
@@ -207,6 +207,7 @@ export class Game {
             }
             const item = this.#dropItems[data.extra.id];
             item.rotation.set(0, 0, 0)
+            item.rotateOnWorldAxis(new THREE.Vector3(0, 1, 0), Math.random() * 6.28)
             item.position.set(data.position.x, data.position.y, -data.position.z)
         }
         if (data.type === SoundType.BOMB_DEFUSED || data.type === SoundType.BOMB_EXPLODED) {
@@ -220,7 +221,6 @@ export class Game {
             grenade.position.set(data.position.x, data.position.y, -data.position.z)
 
             if (data.type === SoundType.GRENADE_LAND) {
-                grenade.rotation.set(0, 0, 0)
                 this.#grenadeLand(data.extra.id, data.item, data.player, data.position)
             }
         }