Suppose you have one thousand mousetraps with ping-pong balls placed on each one. Now add another ball. The first trap is hit causing a rather large reaction involving all of the other traps. Balls are falling and traps are going off in this demo.
This last demo was the one that really turned our heads. Those of you who have been scared by this experience in physic'c class are already familiar with the concept. Basically you take a room whose floor is covered with mousetraps. Each mousetrap has a ping pong ball on top of it. Seamus threw another ping pong ball into the room, setting off a chain reaction that sent all of the ping pong balls and the mouse traps flying into the air. The effect was spectacular. Seamus even slowed down the action and showed us the motion blur on each of the objects. We were simply amazed by all of the animation that was happening on-screen.