So a man walks in to a bar and sees a jar of money on the table. He goes "Hey, bartender, what's with the jar of money?"
The Bartender continues washing the mug he's cleaning and leans in, then goes "It's for a bet that the house holds. No man has ever been able to do it."
The man says "Okay, try me. I won't know until I hear it."
The Bartender sighs and puts down the mug. He points at a small steel barrel behind the bar. "See that? It's full of spicy cider. If you can drink the entire thing, from first drop to last, without putting the barrel down, you win that part."
"That part?" the man says, a little concerned.
"Next," the Bartender says, "is the pit bull in the back. He was raised as an attack dog, the owner fed him gunpowder and eventually died. We can barely go out and feed him. He's got a loose, aching tooth. You have to go remove that tooth."
The man gulped. "And that's it?"
"You wish. There's a 90 year-old woman upstairs, never had sex. Go up there, tell her what you're there for, and if she accepts, you do the deed." The Bartender winced mentally at the thought.
The man scoffed. One, maybe two of those things, that could be possible, but all three? He turned the offer down, but drink after drink, the idea truly could not leave his mind, and eventually started to seem pretty attractive. "ALRIGHT!" he leaped up from the bar screaming. "I'M GONNA DO IT!" He grabbed the barrel of cider and tilted it up, tears running down his face. Pushing it away from his lips, not a single drop fell to the floor.
The bartender gave him the keys to the back door and pantomimed a cross on his chest.
There was howling and screeching for what seemed like hours over the next ten minutes. The man kicked open the door to the bar, threw the key on the counter, bleeding and scratched up. He looked the bartender square in the eye and said "Now where's that old woman with the loose tooth?"