Can’t figure out how to get back at your room mate for stealing the cookies? Perhaps a powerful DIY BB gun might be able to do the trick. Someone out there apparently got bored and decided to come up with a BB gun using an air compressor, fitting a one way valve that blocks air from the firing chamber but allows air in the other direction to rapidly propel ammo into the gun. If you’re still confused at how it’ll get your room mate begging for mercy, check out a video of it in action after the jump.