public IEnumerator ShowExplosion(Vector3 pos, Quaternion rotation, Explodable expl, float delay)
{
yield return(new WaitForSeconds(delay));
if (expl.DoShowIndirectExplosions())
{
Instantiate(explosion, pos, rotation);
}
// explode it for real
expl.Explode(this, BarrelExplosionPwr);
}