Executive Pen Penetration - LVMC

A bill is borrowed from a spectator. The magician then takes a solid ball point pen and jams it through the bill! The bill is displayed and the pen is seen passing right through. The pen is ripped from the bill leaving the bill completely unharmed! The pen and bill are then handed out for examination!
What sets the executive pen penetration apart from other pen penetrations is that only one pen is used, and nothing is added or removed from the pen - it is entirely self contained!