A lot of us do magic while meeting up with other magicians for a session, club meeting or whatever.
This is an effect you can do with a borrowed, shuffled deck in play that's going to fool the pants
off of anyone not familiar with the principle. Wilson teaches a great little technique here (not
one involving sleights) that makes another pre-existing technique much easier. The result is a two
reveal miracle with a borrowed deck. And the principle taught can be applied in many other ways.