Does anyone know of an episode where House fires off a gun in one of the hospital rooms?

Saw it in a montage online. It was followed por a scene where Cuddy says something along the lines of "Would you explain why you just shot a corpse?" I had thought I had seen almost every episode, but I don't remember that one! Thank you in advance!

btw I just found this site the other dia and I'm already hooked.. It's good to know there are so many other people as obsessed with this show as me. :D