A bill is borrowed from an audience member. A pen is shown and handed to the spectator and you instruct them to sign their name on the bill. After everything is inspected you take the pen and stab the bill puncturing the currency. A hole has now been created through in the bill. But not to worry. Remember, this is JUST a trick. You immediately pull the pen back through and show that no harm has been done to the bill. In fact, there are no tears and the name is till on the bill!