When someone closes the bathroom door behind them after unloading a weeks worth of bowel movements. The offender often thinks they are doing a favor by keeping the stench trapped in the small space without proper ventalation instead of leaving the door open for air to circulate. Much like a dutch oven on a larger scale or hot box, only not fun.
Jim - who stink boxed the bathroom!
Sally - well i didnt want the rest of the house to smell.
Jim- a courtesy flush would of been nice!