I was trying to decide whether I wanted the default weapon or the Mk200 (I think that's it) machine gun. While switching back and forth, my monitors suddenly went black, and then I could see my desktop; but my cursor was still locked to the game. I tried alt-tabbing and ctrl-alt-del'ing but nothing would bring my game session back up. I eventually opened my task manager to see that the game was not responding, so I ended the program. {F26900}