Tetris, the Nintendo Game Boy classic, might cure insomnia! In 2009, researchers determined that Tetris inhibited painful flashbacks when they exposed three groups of people to a 21-minute video showing traumatic events. Members of the group that played Tetris for ten minutes post-viewing had fewer flashbacks about the events in the video than those in the other groups who were asked to either do nothing or take a quiz. Why? Because playing the game engages a part of the brain responsible for storing memories. Try your hand at Tetris up to six hours after a traumatic event for fewer nightmares.