The late 1970s and '80s were all about the slasher craze in the horror genre, with a plethora of masked men hacking their way through cinema screens. He might not have been the first, but the one who made the trend popular was Michael Myers in 1978's Halloween. John Carpenter created an iconic and terrifying villain with a man in a mask who didn't speak and who had no motive (the horrible sibling twist didn't exist yet). We can only guess what really drove him to stalk Laurie Strode (Jamie Lee Curtis) and her friends, or what led him to kill his sister 15 years before. The closest we'll ever get to an answer is from an interview with Carpenter himself, who admitted that Michael Myers is based on a real person he once met.