A functioning Portal turret gun!

A student at Penn State University decided, for the finals of his Advanced Mechatronics class, to build a fully-functioning turret gun from Portal - though this one only fires NERF bullets (not sure whether to be unhappy or relieved about that). He does say, in the video below, that he's still to create the proper shell for it, which is why it looks a little odd.

There's only one logical step up from this: GLaDOS. Just make sure to use NERF Neurotoxin, okay?

Thanks to Geeks Are Sexy for bringing this one to our attention!