Oct 06 2009
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METHOD AND MEANS FOR CREATING ANTI-GRAVITY ILLUSION
A system for allowing a shoe wearer to lean forwardly beyond his center of gravity by virtue of wearing a specially designed pair of shoes which will engage with a hitch member movably projectable through a stage surface. The shoes have a specially designed heel slot which can be detachably engaged with the hitch member by simply sliding the shoe-wearer’s foot forward, thereby engaging with the hitch member.
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US Patent number 5,255,452, awarded to Michael Jackson et al. on Oct. 26, 1993
I always wondered how he did that.