diff --git a/server/gameserver/obstacle.cc b/server/gameserver/obstacle.cc
index 05ea2fa..7c10130 100644
--- a/server/gameserver/obstacle.cc
+++ b/server/gameserver/obstacle.cc
@@ -669,31 +669,37 @@ bool Obstacle::DoInteraction(Human* sender)
 
 int Obstacle::OnCollisionTrigger(Creature* c, ColliderComponent* collider)
 {
-    return 0;
-    #if 0
-    opt_result = kOptPass;
-    switch (meta->i->thing_type()) {
-    case kObstacleSpring:
+    if (IsDead(c->room)) {
+        return 0;
+    }
+    switch (meta->i->collision_hit()) {
+    case kCollisionHitPass:
         {
-            if (c->IsHuman()) {
-                if (!c->AsHuman()->GetCar()) {
-                    AddObstacleBuff(c);
-                    a8::SetBitFlag(c->status, CS_Collisioning);
-                    opt_result = kOptBreak;
-                }
+            return 0;
+        }
+        break;
+    case kCollisionHitBlock:
+        {
+            Global::last_collider = collider;
+            return 1;
+        }
+        break;
+    case kCollisionHitDeadAndDrop:
+        {
+            if (c->room->GetGasData().gas_mode != GasInactive &&
+                meta->i->drop() != 0 &&
+                c->IsHuman()) {
+                Die(c->room);
+                c->DropItems(this);
+                BroadcastFullState(c->room);
+                return 0;
             }
         }
         break;
-    case kObstacleMine:
-    case kObstacleTrap:
+    case kCollisionHitSpecEvent:
         {
-            if (c->team_id != GetTeamId(c->room)) {
-                AddObstacleBuff(c);
-                #if 0
-                Explosion();
-                #endif
-                Die(c->room);
-                BroadcastFullState(c->room);
+            if (ProcSpecEvent(c, collider)) {
+                return 0;
             }
         }
         break;
@@ -702,40 +708,8 @@ int Obstacle::OnCollisionTrigger(Creature* c, ColliderComponent* collider)
         }
         break;
     }
-    #endif
-    #if 0
     Global::last_collider = collider;
-    #endif
-#if 0
-    if (!obstacle->IsDead(room) &&
-#if 0
-        obstacle->Attackable(this) &&
-#endif
-        obstacle->meta->i->drop() != 0 &&
-        obstacle->IsTouchInteraction() &&
-        room->GetGasData().gas_mode != GasInactive &&
-        (!obstacle->IsTerminatorAirDropBox(room) || GetRace() == kHumanRace)
-        ) {
-        obstacle->Die(room);
-        if (obstacle->IsDead(room)) {
-#if 0
-            if (obstacle->meta->i->damage_dia() > 0.01f &&
-                obstacle->meta->i->damage() > 0.01f) {
-                obstacle->Explosion(this);
-            }
-#endif
-            DropItems(obstacle);
-        }
-        obstacle->BroadcastFullState(room);
-        if (obstacle->IsTerminatorAirDropBox(room) &&
-            GetRace() == kHumanRace &&
-            !HasBuffEffect(kBET_Terminator)) {
-            MetaData::Buff* buff_meta = MetaMgr::Instance()->GetBuff(TERMINATOR_BUFF_ID);
-            if (buff_meta) {
-                AddBuff(this, buff_meta, 1);
-            }
-        }
-#endif
+    return 1;
 }
 
 void Obstacle::DoHideHouseInteraction(Human* sender)
@@ -888,3 +862,39 @@ bool Obstacle::ReceiveExplosionDmg(Explosion* explosion)
     }
     return false;
 }
+
+bool Obstacle::ProcSpecEvent(Creature* c, ColliderComponent* collider)
+{
+    switch (meta->i->thing_type()) {
+    case kObstacleSpring:
+        {
+            if (c->IsHuman()) {
+                if (!c->AsHuman()->GetCar()) {
+                    AddObstacleBuff(c);
+                    a8::SetBitFlag(c->status, CS_Collisioning);
+                    return true;
+                }
+            }
+        }
+        break;
+    case kObstacleMine:
+    case kObstacleTrap:
+        {
+            if (c->team_id != GetTeamId(c->room)) {
+                AddObstacleBuff(c);
+                #if 0
+                Explosion();
+                #endif
+                Die(c->room);
+                BroadcastFullState(c->room);
+                return true;
+            }
+        }
+        break;
+    default:
+        {
+        }
+        break;
+    }
+    return false;
+}
diff --git a/server/gameserver/obstacle.h b/server/gameserver/obstacle.h
index 69bb897..b6086a1 100644
--- a/server/gameserver/obstacle.h
+++ b/server/gameserver/obstacle.h
@@ -81,6 +81,7 @@ protected:
     void AddObstacleBuff(Creature* c);
     void ClearObstacleBuff(Creature* c);
     bool IsHalfWallCollider();
+    bool ProcSpecEvent(Creature* c, ColliderComponent* collider);
 
 protected:
     CircleCollider* self_collider_ = nullptr;