Staying in a chain hotel, Western Europe, 8am. I'm up but also naked in bed, having a coffee. Someone knocks on the door, I ignore it, not sure if it's my door or someone else's. Then the door opens and a man calls out something, I dive under my sheets and I think I shouted out 'there's someone in here', so the door closes. I throw some clothes on, go in the corridor and say to the guy that check out is 11, and also angrily 'don't come in my room, what the hell!' I didn't have a 'do not disturb ' sign on my door, but then I wouldn't expect to have to use it if I'm checking out before 11. AIBU to complain?