// OnTriggerExit: Asteroids, Bullets and PickableItems will be destroid.
 // SpaceShip will be destroid if it's ouside (means that there is another spaceship inside)
 // Spaceship will not be destroid if it's inside play area (SpaceShip can rotate while colliding)
 public void OnTriggerExit(Collider other)
 {
     cyclicObj = other.gameObject.GetComponent <CyclicMoveable>();
     if (cyclicObj)
     {
         HandleExitCyclic(cyclicObj);
         return;
     }
     bullet = other.gameObject.GetComponent <Bullet>();
     if (bullet && IsPosOutsideScreen(bullet.transform.position))
     {
         bullet.Selfdestruct();
         return;
     }
     pickable = other.gameObject.GetComponent <PickableItem>();
     if (pickable && IsPosOutsideScreen(pickable.transform.position))
     {
         pickable.Selfdestruct();
     }
 }