I got this trick for free but I would have been upset if I had paid for it. The effect is cool but
nothing is inspectable which sucks because people always want to inspect a trick that only uses four
cards. I would not consider this effect for a professional routine unless someone jazzed it up with
a switch. However, if you can do switches, you probably don't need gimmicks like these anyway.
It's still a fun goof-off trick though.