When Michael Jackson first performed his legendary antigravity lean live, audiences were left stunned. During his Dangerous World Tour in the early 1990s, he and his dancers tilted forward an incredible 45 degrees during Smooth Criminal—seemingly defying the laws of physics. Fans had witnessed the move in the Smooth Criminal music video, but seeing it executed live—without any camera tricks—was something else entirely. The secret lay in specially designed shoes, co-patented by Jackson, that latc