Super Chair Suspension is an illusion where a person floats in midair, supported only by the back of a fold-up chair.
A magician places two foldable chairs facing each other, then he puts a board across, on top—bridging the two chairs. Someone lies on top of this board, and the magician wraps them in cloth. He then removes one chair, leaving the board and the person to hover, supported by the remaining chair. The magician finally removes the board itself, leaving the person to hover.
References
Super chair suspension Wikipedia(Text) CC BY-SA