It's a promotion for a sandwich shop chain, and they don't provide much of the detail us weenies would like, such as how to make one yourself. But the air cannon constructed by a team from Erbert and Gerbert is still a thing to behold. So watch and envy, as if you needed any encouragement after the word "cannon."
www.youtube.com/watch?v=&rel=1&border=0
Candle Cannon
[Erbert and Gerbert]
