Boom!

How about a confetti cannon?

You had to use a bicycle pump to create enough pressure for the cannon to release... (about 15 minutes of pumping = 50 bar) and then you were directed to step in the middle of the lane. The designer pulled the lever and this happened! :D

You can find this on the annual Dutch Design Week in Eindhoven at Sectie C, hal 8 (or check the map).
Go!