Arduino Nerf Sentry Gun

*I don't wanna get all fussy and bring-down about home tinkering, but this is an unmanned, dirt-cheap, open-source, robot sniper rifle. I'm a little perturbed about the implications here. This is like building an IED that blasts nice soft marshmallows.

http://blog.makezine.com/archive/2010/05/arduino_nerf_sentry_gun_build_prima.html