Well, there goes the GPA! (Score 5, Funny)

Professor: James, what's happened? It seems like your studies have become disorganized - and your test scores have taken a turn for the worse. Is there anything I need to know?

Me: I'm having.. trouble sleeping, Professor. It .. it's hardest to watch for .. these.. these headcrabs.. especially at night.

Professor: *leans closer* I know; scary little bastards.