Ideas for Pneumatic Cylinders

[Nate_Hub]

I recently acquired 2 relatively heavy duty pneumatic rams (body roughly a foot long, stroke a little less than a foot). What should I make?

I was thinking can crusher or some kind of automatic opening door... but those ideas just sound to lame to put any effort into it.
It doesn't have to be practical at all, just want to make something fun since I got the rams and control valves for free.

THANKS

[Hotwired]

Pneumatic catapult

Ram -> lever -> projectile

[jackssmirkingrevenge]

Pneumatic catapult

Seconded.

http://gbcannon.com/projects/launchers/hsl.html

Firing something heavy at relatively low velocity