A great trick by Jay Sankey. You ask for a loan of a banknote. Any banknote. You display a small metal disc. You explain that the disk is made from an unidentifiable material found at the crash site of a UFO! Or you can just say it is a metal disc… Either way, you begin to rub the disc across the bill and it starts to melt through. This is a startly visual moment as you show the disc half way through the bill – half way into the top and coming out at the bottom. Finally, you cause the disc to pop right through the bill and into the spectators waiting hands.