I can't think of any other speedrun that's partially done in reverse. This Sega Genesis "Michael Jackson's Moonwalker" game from 1990 is beaten in just under 24 minutes. Just as it grows boring Michael pulls out his anti-gravity moves and gets his enemies to dance in unison with him. And whenever it looks like Michael's in trouble he whips out his..... chimpanzee from a closet! All of this isn't far from reality, but the part that makes me say hmmmm is that there's a bunch of little girls running around. How come my parents never bought me this game? Oh yah, 'cuz my cat chewed through all my Sega power cables!