I might agree with you about that. We'd had the maid knock on the door in the past. Always startling, but not the end of the world. In that case, we'd just tell her the room was occupied, she'd go away and we'd make sure the "do not disturb" sign was on the door. In this case, however, there was either no knock, or he knocked and then opened the door without waiting for an answer. Either way, he was suddenly inside the room which was quite alarming. It was during the day, either late morning or early afternoon. It wasn't the maid either, I remember it being a male member of the hotel staff. We had the impression he thought the room was vacant. It was several years ago, so my memory of the event is a bit sketchy, but that's how I recall it now. It was deeply unsettling, but nothing bad came of it. I was able to get back into the right head space and enjoy the rest of the session, after my heart stopped pounding.