Hi guys, A few days I got the idea of using a crimp in a demo of finding the aces: While riffle shuffling, you crimp the top card (the ace), give the deck a few more cuts and shuffles and let a spectator cut to the last ace. I don't expect this idea to be new, so I'll ask what your experiences and difficulties have been. Is the reaction worth the trouble? Does this ending to the routine make a lot of difference for the spectator? Thanks for you help!