Slightly less perilous than a Lava Pit or Shark Pool but menacing none the less, the victim is Locked in a Room that is slowly filling with water. Could be accidental — like being sealed in a room with a busted water pipe — or an insane individual with a penchant for drama could have locked them there as cheap entertainment. Either way, the Big Damn Heroes better bash the glass wall or shut off [...] [tvtropes.org]