A drunk gets up from the bar stool at Zaveral's and heads for the bathroom.
A few minutes later a loud, blood curdling scream is heard coming from the bathroom.
A few minutes after that another loud scream reverberates through the bar.
Gary goes into the bathroom to investigate why the drunk is screaming.
"What's all the screaming about in there?" he yells, "You're scaring the hell out of all my customers!"
"I'm just sitting here on the toilet," slurs the drunk, "and every time I try to flush, something comes up and squeezes the hell out of my balls!"
Gary opens the door, looks in, and says, "You idiot! You're sitting on the mop bucket!"