I was at a bar with friends and we were the last ones there hanging with the bartender and I went to the restroom downstairs and while in there, there was 2 knocks on the door and I called out saying I was in there and then opened the door seeing nothing thinking my friend went back upstairs and when I went upstairs I told them about it and they all said they were just hanging out upstairs talking. That was exciting and a first time experiencing something like that….