One of my favorite This American Life episodes where Penn and Teller talk about the genesis of this trick: https://www.thisamericanlife.org/619/the-magic-show

One of my favorite This American Life episodes where Penn and Teller talk about the genesis of this trick: https://www.thisamericanlife.org/619/the-magic-show https://www.thisamericanlife.org/619/the-magic-show Explains the significance of Penn's ball kick at the end.