There's an old 60's high school science film of them doing this with a roomful of mouse traps with two ping pong balls poised on each one.....they throw one ball into the room for the reaction to begin....

takes a lot of balls to do something like that

I found this as I was trying to visually explain the problem of exponential growth in a system to a friend. Its a great representation of how crazy multipliers get.

needs slow mo bad...

I will build a next generation automobile with this type of propulsion.

*brief

Somebody needs to promote this someday; if only because of deathcow's initial comment above

This video has been flagged as being less than 1 minute in length - declared brief by EDD.