An easy way to do this is to have the folded card in your right hand (palmed), you place the ripped pieces in the same hand, but hold them with your fingers. Yo

An easy way to do this is to have the folded card in your right hand (palmed), you place the ripped pieces in the same hand, but hold them with your fingers. You look like your folding the pieces up, then make the switch as you place it in his hand, fold it up and tell him to hold it tight. Of course this is done in one fluid motion, so he doesn't see the slight of hand switch - like the guy does at the very end of the video.