Buster Douglas
There was a time when Mike Tyson was the most terrifying man on the planet. People described the ruthless heavyweight’s performances as executions because hardly anyone made it out of the first round. He brutalized his opponents and scored horrifying knockouts that made him a massive star (via Andscape).

Douglas shocked the world at the Tokyo Dome in 1990. He knocked Tyson out for the first time and became a heavyweight champion. It was an amazing moment that instantly turned him into a global sensation. But fame went to Douglas’s head and he lost the rematch. His career fizzled out because he partied too hard.