PIRA Classification: 2B30.70
Description: An 8 foot PVC pipe has an ID slightly larger than the diameter of a ping pong ball (the ball fits snuggly). The ball is placed inside and the ends are sealed. When ready, the tube is pumped down for at least 30 seconds. The seal at one end is punctured using a pair of scissors, causing the ball to be shot out of the other end (with a satisfying bang). Pop cans are placed in front of the pipe to absorb most of the energy. Many times, the ball will have sufficient velocity to punch a hole through two or all three cans!
Special Instructions: Wait at least 30 seconds (if not longer) for the tube to pump down.
Condition: OK
Setup time: 5 minutes
Safety Issues: Aim the tube AWAY from the class. This demo is LOUD.