Michael Jackson's Anti-Gravity Illusion

Remember the King of Pop in your physics class: in his video "Smooth Criminal", Michael Jackson and his dancers lean at an angle far beyond their centers of gravity (CG). The trick is explained in the patent granted to Jackson and his collaborators. They were equipped with specially designed shoes with holes in the heels, with a wedge that could be hooked to a hitch in the floor. The shoes were reinforced with a sock-like covering over the ankle.