John Milius wrote the line, "Go ahead, make my day," for Clint Eastwood's "Dirty Harry" character in Sudden Impact

John Milius is one of the original founders of the Ultimate Fighting Championship.

Kevin Smith sold his comic book collection for money to film Clerks. (1994) and after the film was a success he bought the collection back.

Terry Gilliam turned down the chance to direct the American Beauty.