A physics professor at the University of Oklahoma wanted to prove a point — no laptops allowed in class, so he dipped a laptop in liquid nitrogen and then proceeded to smash it. Video after the break.

Balk all you want (understandable given his own clipped-on cellie), but if you sign up for this guy’s class, you’ll be flipping your phone to “off” and leaving your laptop in the dormitory.

[via Engadget]