Some of these responses are pretty much what I would have been like. xD
I stay in University accommodation with about 8 other people in one flat, so to be honest I'd be totally unsurprised if people came knocking at that time. Had it happen before, haha.
Last time, I was awake anyway so it wasn't too bad. Answered the door in shorts and a tshirt and had to explain why I was going to bed to a very intoxicated flatmate.
It was hilarious in hindsight, but not so much at the time.