I have one of those stand alone shower stalls in my basement, looks like a phone booth.
My 9 year old kid threw his t-shirt in to cover the drain, turned on the water, and shut the door. He proceeded to duct tape the door seam to see how full that sucker would get. Crazy bastard.
Anyway... it was interesting to say the least. Once i figured out what he was doing in there I had a dilemma. No real choice but to open the door and let 4 feet of water out.
Yikes that sucks. I would have thrown him over the top and make him turn off the water and unplug the drain.