Bartender replies "Well, first you have to drink that whole gallon of pepper tequila, the WHOLE thing at once and you can't make a face while doing it. Second, there's a 'gator out back with a sore tooth...you have to remove it with your bare hands. Third, there's a woman up-stairs who's never had an orgasm. You gotta make things right for her." The guy says, "Well, as much as I would love free beer, I won't do it. You have to be nuts to drink a gallon of pepper tequila and then get crazier from there.
Well, as time goes on and the man drinks a few, he asks, "Wherez zat teeqeelah?"
He grabs the gallon of tequilla with both hands, and downs it with a big slurp and tears streaming down his face. Next, he staggers out back and soon all the people inside hear the most frightening roaring and thumping, then silence. The man staggers back into the bar, his shirt ripped and big scratches all over his body.
"Now" he says "Where's that woman with the sore tooth?"