Michael Jackson, king of pop and.. inventor?
If you view the patent, you’ll see that the sole of the shoe had a very special notch and plate in it, and unbeknown to the public, there was a steel peg in the stage that allow the dancers to lock the special shoe down to hold their weight. Pretty amazing stuff.
Here’s the video, if you watch at 3:53, you can see the shoes in action. Also, watch the guy on the right, he has problems disengaging from the floor.
[via BoingBoing]