What's the Worst That Could Happen?

What do you suppose would happen if I just... didn't go in and take my exam this afternoon?

It's not that I'm afraid of this exam (it's probably the second easiest class I took this semester) or that I'm not prepared for it. It's just that I don't want to get dressed, haul myself in to school (though at least we didn't get the snow that was predicted for last night), and go through the motions of taking the stupid exam.

Will I get an F? An "incomplete"? Will the Registrar hunt me down and beat me with a stack of course selection forms?