Grease - Banana Split
Watch the scene where the whole gang is in the diner, at Danny and Sandy's table. You'll hear someone (Sonny or Doody) order ice cream "with four spoons." Later on, watch Doody as he's eating it right after Sonny hands it to him. He takes a bite and puts it on the table; then the shot cuts closer, and he puts it down again, even though he hadn't picked it back up.