Magic Tricks

Great trick with a loverly presentation. As others have pointed out, it is not foolproof and you can run into a scenario where it isn't as smooth as in the demo. He does provide an out for the situation where the spectators choices are not optimal, and that will happen about 10-20% of the time. Also, the "out" in this scenario is not technically difficult, but requires you to remain cool.

However, if you buy from Penguin and look at the discussion group, there are suggestions of how you can alter the routine slightly to make it foolproof and still seem as fair as as what Roberto presents.