Originally Posted by adam ant

he polished a small portion of the coral, until it was smooth as glass.
then he placed salt or sugar on that spot. he would then play some sort of wind instrument, a trumpet/flute, until the salt violently dances off of the coral. you see, when you calmly match an objects resonant frequency (low amplitude) it will identically vibrate to match the tone you play. you can test this on bricks, concrete, tile, wood etc. to find their resonant frequencies.

now all we have to do is figure out how he used that to levitate them !!!!