The Good: You really can use anyone's cell phone and balloon. The balloon is ungimmiicked. It's
interactive because you get to use their cellphone. At the end, they can take the cell phone out.
The Bad: The secret, sleight of hand move has to happen right in front of them. If they
don't see exactly what you are doing, they assume you do something sneeky right then because you
have to do it right in front of their faces. And then is when they are watching you the most
closely. It's easy to spot the move even if you do it well. I choose not to do this trick anymore
because of this.