One scene was removed from the final cut of the film that referred to the Three Mile Island accident . " I had a father and a mother , " Brooks said , " made up to look like half a dog and half a cat as a result of a nuclear meltdown . But the audience was seriously chilled and did n't laugh , so I left it out . " '' History of the World , Part I '' was a box office success , grossing $ 31.7 million from a $ 10 million budget . It grossed $ 4.8 million in its opening weekend , finishing second at the box office
Three Mile Island accident
Three Mile Island accident
History of the World, Part I