diff --git a/server/gameserver/bullet.cc b/server/gameserver/bullet.cc
index 02721a8..da36d76 100644
--- a/server/gameserver/bullet.cc
+++ b/server/gameserver/bullet.cc
@@ -313,15 +313,13 @@ void Bullet::Check(float distance)
         std::set<ColliderComponent*> colliders;
         room->map_service->GetColliders(room, GetX(), GetY(), colliders);
         for (ColliderComponent* collider : colliders) {
-            if (TestCollision(room, collider) &&
-                !a8::HasBitFlag(collider->tag, kHalfWallTag)) {
-                if (collider->owner->IsEntityType(ET_Obstacle)) {
-                    Obstacle* obstacle = (Obstacle*)collider->owner;
-                    if (obstacle->CanThroughable(this)) {
-                        continue;
+            if (collider->owner->IsEntityType(ET_Obstacle)) {
+                Obstacle* obstacle = (Obstacle*)collider->owner;
+                if (!obstacle->CanThroughable(this)) {
+                    if (TestCollision(room, collider)) {
+                        objects.insert(collider->owner);
                     }
                 }
-                objects.insert(collider->owner);
             }
         }
     }
diff --git a/server/gameserver/car.cc b/server/gameserver/car.cc
index 31e1e8d..f0b4cef 100644
--- a/server/gameserver/car.cc
+++ b/server/gameserver/car.cc
@@ -12,6 +12,7 @@
 #include "typeconvert.h"
 #include "bullet.h"
 #include "explosion.h"
+#include "obstacle.h"
 
 Car::Car():Creature()
 {
@@ -343,6 +344,7 @@ void Car::BeKill(int killer_id, const std::string& killer_name, int weapon_id)
                                  meta->i->explosion_effect(),
                                  meta->i->atk()
                                  );
+    room->NotifyUiUpdate();
 }
 
 void Car::GetAabbBox(AabbCollider& aabb_box)
@@ -392,3 +394,10 @@ float Car::GetMaxOil()
 {
     return meta->i->max_oil();
 }
+
+void Car::DropItems(Obstacle* obstacle)
+{
+    if (obstacle->meta->i->drop() != 0) {
+        room->ScatterDrop(obstacle->GetPos(), obstacle->meta->i->drop());
+    }
+}
diff --git a/server/gameserver/car.h b/server/gameserver/car.h
index 36ddc4e..a7edae4 100644
--- a/server/gameserver/car.h
+++ b/server/gameserver/car.h
@@ -43,6 +43,7 @@ class Car : public Creature
     virtual void DecHP(float dec_hp, int killer_id, const std::string& killer_name, int weapon_id) override;
     virtual void SendDebugMsg(const std::string& debug_msg) override;
     virtual void SetAttackDir(const a8::Vec2& attack_dir) override;
+    virtual void DropItems(Obstacle* obstacle) override;
 
  private:
     int AllocSeat();
diff --git a/server/gameserver/explosion.cc b/server/gameserver/explosion.cc
index 2918cbb..68b16e5 100644
--- a/server/gameserver/explosion.cc
+++ b/server/gameserver/explosion.cc
@@ -73,6 +73,9 @@ void Explosion::InternalAttack()
          grid_list,
          [this, &objects] (Creature* c, bool& stop)
          {
+             if (c->GetUniId() == exclude_uniid) {
+                 return;
+             }
              if (!c->Attackable(room_)) {
                  return;
              }
@@ -98,6 +101,9 @@ void Explosion::InternalAttack()
          grid_list,
          [this, &objects] (Entity* entity, bool& stop)
          {
+             if (entity->GetUniId() == exclude_uniid) {
+                 return;
+             }
              if (!entity->Attackable(room_)) {
                  return;
              }
diff --git a/server/gameserver/explosion.h b/server/gameserver/explosion.h
index 92b3966..4856975 100644
--- a/server/gameserver/explosion.h
+++ b/server/gameserver/explosion.h
@@ -6,6 +6,7 @@ class Room;
 class Explosion
 {
  public:
+    int exclude_uniid = 0;
 
     Room* GetRoom() { return room_; };
     CreatureWeakPtr GetSender() { return sender_; };
diff --git a/server/gameserver/obstacle.cc b/server/gameserver/obstacle.cc
index 3b464f4..d730135 100644
--- a/server/gameserver/obstacle.cc
+++ b/server/gameserver/obstacle.cc
@@ -469,6 +469,9 @@ void Obstacle::SetMasterId(Room* room, int master_id)
 
 void Obstacle::OnBulletHit(Bullet* bullet)
 {
+    if (meta->i->bullet_hit() == kBulletHitEatDmg) {
+        return;
+    }
     if (!IsDead(bullet->room) &&
         !IsTerminatorAirDropBox(bullet->room)) {
         if (meta->receive_special_damage_type != 0 &&
@@ -510,6 +513,17 @@ void Obstacle::OnBulletHit(Bullet* bullet)
         if (IsDead(bullet->room)) {
             ProcDieExplosion(bullet->room);
             bullet->sender.Get()->DropItems(this);
+            if (meta->i->thing_type() == kObstacleOilBucket) {
+                MetaData::MapThing* bomb_meta = MetaMgr::Instance()->GetMapThing(meta->int_param1);
+                if (bomb_meta) {
+                    RoomObstacle* obstacle = bullet->room->CreateObstacle
+                        (
+                         bomb_meta->i->thing_id(),
+                         GetPos().x,
+                         GetPos().y
+                         );
+                }
+            }
         }
         BroadcastFullState(bullet->room);
 #ifdef DEBUG
@@ -553,6 +567,17 @@ void Obstacle::OnExplosionHit(Explosion* e)
         if (meta->i->drop() != 0) {
             e->GetRoom()->ScatterDrop(GetPos(), meta->i->drop());
         }
+        if (meta->i->thing_type() == kObstacleOilBucket) {
+            MetaData::MapThing* bomb_meta = MetaMgr::Instance()->GetMapThing(meta->int_param1);
+            if (bomb_meta) {
+                RoomObstacle* obstacle = e->GetRoom()->CreateObstacle
+                    (
+                     bomb_meta->i->thing_id(),
+                     GetPos().x,
+                     GetPos().y
+                     );
+            }
+        }
     }
     BroadcastFullState(e->GetRoom());
 }
diff --git a/server/gameserver/room.cc b/server/gameserver/room.cc
index 3f9538a..a76f37f 100644
--- a/server/gameserver/room.cc
+++ b/server/gameserver/room.cc
@@ -3969,14 +3969,16 @@ void Room::AirRaid(int airraid_id)
                           );
                      a8::Vec2 dir = a8::Vec2::UP;
                      dir.Rotate(a8::RandAngle());
-                     a8::Vec2 pos = center +  dir * (50 + rand() % 100);;
-                     RoomObstacle* obstacle = room->CreateObstacle
-                         (
-                          raid_meta->i->bomb_id(),
-                          pos.x,
-                          pos.y
-                          );
-                     obstacle->Active();
+                     a8::Vec2 pos = center +  dir * (50 + rand() % 100);
+                     if (room->grid_service->CanAdd(pos.x, pos.y)) {
+                         RoomObstacle* obstacle = room->CreateObstacle
+                             (
+                              raid_meta->i->bomb_id(),
+                              pos.x,
+                              pos.y
+                              );
+                         obstacle->Active();
+                     }
                  };
              Room* room = (Room*)param.sender.GetUserData();
              if (room->IsGameOver()) {
diff --git a/server/gameserver/roomobstacle.cc b/server/gameserver/roomobstacle.cc
index af8a9ec..75531e4 100644
--- a/server/gameserver/roomobstacle.cc
+++ b/server/gameserver/roomobstacle.cc
@@ -183,14 +183,17 @@ void RoomObstacle::SpecExplosion()
         bomb_born_offset.Rotate(a8::RandAngle());
         bomb_born_offset = bomb_born_offset * a8::RandEx(1, std::max(2, meta->i->explosion_float()));
         a8::Vec2 bomb_pos = GetPos() + bomb_born_offset;
-        Explosion explosion;
-        explosion.IndifferenceAttack(
-                                     room,
-                                     bomb_pos,
-                                     meta->i->damage_dia(),
-                                     meta->i->explosion_effect(),
-                                     meta->i->damage()
-                                     );
+        if (room->grid_service->CanAdd(bomb_pos.x, bomb_pos.y)) {
+            Explosion explosion;
+            explosion.exclude_uniid = GetUniId();
+            explosion.IndifferenceAttack(
+                                         room,
+                                         bomb_pos,
+                                         meta->i->damage_dia(),
+                                         meta->i->explosion_effect(),
+                                         meta->i->damage()
+                                         );
+        }
     }
     if (explosion_times_ >= meta->i->explosion_times()) {
         room->xtimer.DeleteTimer(room->xtimer.GetRunningTimer());