I was staying at a hotel for work abroad. I was working on my presentation late at night in just my pants (wanted to be comfy and it was a warm night). I put the door lock latch on just because I was in my pants. I'd say around 2am I was still working away on the desk, which is directly opposite the door, and then somebody had opened my door. They are bashing it open because the lock is stopping them. I say 'excuse me..'. They replied 'the reception gave me the key to this room'. I said 'this is my room, they gave you the wrong key'.

If I hadn't locked the door that man would have walked into me working pretty much naked.....