I went to the beach about 4 years ago with some friends of mine. My one buddy and his girlfirend were in the shower and wouldn't come out and we were all dressed to get something to eat. Next to my bed was a small door that gave you access to the water valves. After pounding on the door for like 10 minutes, I finally just turned the hot water off. They started screaming and pounding on the walls, it was funny.