A drunk walks into a bar and says to the bartender "Hey bartender. If I show you a trick will you give me a free drink?"
The bartender says "sure" and the drunk pulls a frog out of his pocket and sets it down on the table. The frog then plays the best jazz the bartender heard in years and he gives the drunk his free drink.
The drunk says "Hey bartender. If I show you another trick will you give me another free drink?" The bartender says "If it's anything like the trick you just showed me, you can drink the rest of the night for free."
So the drunk pulls a rat out of his pocket and the rat starts singing. The bartender starts pouring drinks for the drunk as fast as the drunk could drink them.
Two hours later, an agent walks into a bar and sees the frog and the rat. He walks up to the bartender and says "That's the greatest act I've seen in years. Who owns that act?"
The bartender points to the drunk who's passed out on the floor and says "He does."
The agent wakes the drunk and says "That's the greatest act I’ve seen in years. I'll give you $100,000 for that act."
The drunk says "There not for sale."
"Ok," the agent says "then I'll give you $50,000 for the singing rat."
"It's a deal" the drunk says so the agent gives him the money and leaves with the rat.
"I can't believe you! You had a million dollar rat there you just passed it up for a measly 50 grand" the bartender yells.
"Relax," said the drunk, "The frog's a ventriloquist."