Rain Main is the 1988 American road comedy-drama film starring Tom Cruise and Dustin Hoffman. It tells the story of Raymond (Dustin Hoffman), an autistic savant with extraordinary abilities. But the real life Rain Man, Kim Peek - the man the film was inspired by - was even more incredible. Despite having an IQ that hovered around 87, Peek could read entire books under an hour. His memorization and ability to spout random facts was impressive, so impressive screenwriter Barry Morrow felt compelled to tell his story in the form of Rain Man.