Ok, so I was just watching David Blaine's: Frozen in Time, and he did an effect that was great! I was just wondering if you guys knew where I could get it... David had someone pull a dollar out of their pocket, then he showed that there was two signatures on the bill. The secretary's and treasurers. He then rubbed his finger across the treasurers name and it changed to the spectators. I have NO idea where I could get this. Thanks guys. -blake.