The pipes in my office building are bad. In my old room (gorgeous, had windows overlooking the flightline and the airport across the street, mountains in the distance - now I live in a cave), water mains in the ceiling burst twice overnight, about two years apart. They estimated 20,000 gallons of water flooded it the first time, and 15,000 gallons the second time. First indication there was an 'issue' was the elevator being inoperative and the bottom of the shaft completely full of water. Good times!