This job called for a tire to be shattered by a sledge hammer, as it would if it were frozen with liquid nitrogen. We molded a tire and made castings in plaster weakened by a generous addition of joint compound, then oven dried and painted. A real sledge hammer provided plenty of adequate force for the on set shatter. The effect was shot at high speed to capture all of these split-second performances in their entiety. We made four shattering tire castings, of which the last two takes were deemed as best.