Michael Jackson’s gravity-defying Smooth Criminal dance move was down to core strength and an illusion, scientists have found. The late singer was famous for being able to tilt 45 degrees, seemingly without anything to hold him up. Fans were amazed to see him do the dance move in his 1987 Smooth Criminal video – live. However, a team of neurosurgeons has cracked the mystery behind the seemingly impossible feat. The three surgeons revealed in the Journal of Neurosurgery: Spine that Jackson designed a special shoe with a triangular slot in the heel which hooked onto a metallic peg that came up from the stage floor at the right moment. This allowed him to lean forward at a seemingly impossible angle…