A lit cherry bomb is flushed down a toilet, and the blast creates overpressure which forces water out of the toilet trap, spraying the user in the ass.
The splashing toilet of water onto the buttocks region as a side effect of initiating flush #1 of a double-flush maneuver; primarily due to an extraordinarily stinky or massive dump.
I gave myself a redneck bidet because I blasted a major dookie and had to double flush.
After plunging for several minutes, when the water turns a consistent brown with shreds of toilet paper surfacing consistently, you will feel the pressure drop in your hand(s). At that moment sit down and flush again.
Sorry I got your floor all wet in there but the almighty gave me a redneck bidet before I started to stucco