Trivia: In an interview, the director stated that hoverboards were real, but they weren't on the market because parents didn't like the idea of floating children. He said this as a joke, but this didn't stop mass hysteria as thousands of kids went from store to store looking for hoverboards.
Trivia: Hitler was played by the actor Michael Sheard, this was the third time he had played Hitler for film and TV. Ironically, Sheard's wife was half-Jewish.
Trivia: The town in Iowa that the movie was filmed in was Dyersville. The actual house and farm used in the movie are about 2 miles outside of town and are open to the public.
Trivia: When David Banner is dreaming about his trial, the jury foreperson is played by The Incredible Hulk creator, Stan Lee.
Trivia: This is a true story. After the death of his sister, Robert Harling locked himself in a room and 10 days later came out with this play which 3 years later became a movie. The movie was even filmed in the town that where everything happened and the nurse and doctors who cared for his sister Susan played themselves in the movie.
Trivia: During one of Stanley's Clubhouses, Stanley sprays whipped cream into an audience member's mouth. This is Dr. Demento, the first DJ to put Weird Al on his station. (00:54:50)
Trivia: The dead sailor harbouring a live crab, spooking Jammer out of his wits in the sunk submarine, is director James Cameron's younger brother Mike. The scene had to be shot several times to get it right, forcing Mike to hold the live crabs in his mouth, until the cry for "action", before releasing them. At one point he had to crush one with his teeth, as it gave him quite a bit of grief. Brotherly love immortalized.