This is a video from the University of Tokyo of scientists using four speakers to levitate and move objects in midair. Unfortunately, those objects are limited Styrofoam balls, water droplets, and other pieces of barely there. I want to see them levitate a human. Or implode all their internal organs trying to. Either way, it'll be worth watching.
Keep going for the video, it really is worth a peek.
Thanks to Sean Q, Nils and Arrogant Tiger (two tips in a row -- come up to my desk to receive a gold star sticker), who can all levitate objects with their minds they just never do it in public because then all their friends will ask them to help move.