When the pressure in your asshole reaches critical levels that no man can contain, an explosive bowel movement of gargantuan proportions jetisons all material underneath "the
rocket", displacing the
water in the bowl, creating a geyser of fecal matter. Best used when toilet is clogged.
The appropriate warning for such a manuvuer is to yell "Fire in the Hole!" as loud as possible to save anyone in a 50
foot radius.