Ever had to clean up an area when a head malfunctions? It's an astounding amount of water in a short time and it definitely works.
I haven’t seen one malfunction other than the ones that stick out of the wall in a hotel breaking after being used as a clothes hanger. That soaked multiple floors before it was shut down.
Another time a prisoner at the jail broke one open only to be doused in the face by the nasty stagnant water. Think black mud on the shallow end of the lake.