The reactions you'll get when a borrowed coin vanishes and appears under your spectator's watch are insane. 

Gregor didn't invent the coin under watch, but he did perfect it. He's been performing it for YEARS. Over the course of thousands of performances, he's turned a cool trick into a masterpiece. The live performances alone are worth the price of the video.

Completely impromptu, you'll be doing this everywhere you go.