Hackman's Mustache Bargain

During the production of Superman (1978), Gene Hackman was initially reluctant to part with his mustache. It took Richard Donner's promise to shave his own mustache for Hackman to agree. After Hackman had his mustache shaved, he went to Donner to fulfill the deal. Donner's response? He comically tore off his fake mustache in good humor.