Did you know that Steven Spielberg had two thousand rats bred specifically for the shooting of this scene in Indiana Jones and the Last Crusade? You can't use just any ol' rats because any ol' rats are, you may have heard, stuffed with plague. This does beg the question -- what happened to all of these rats after filming? But I'm sure they all got sent to happy rat homes to live out their happy rat lives. And at least they used fake/animatronic rats for the big fireball moment.