A drunk is sitting at a bar, and says, "Bartender! Another drink."

The bartender shakes his head and says, "No you've had enough."

"Well," the drunk says. "How about if I show you something really cool? Then will you give me a drink?"

"Sure," the bartender says. "But it's gotta be pretty cool."

The drunk takes a tiny piano and a frog out of his pockets and sets them on the bar. The frog starts banging away, playing a beautiful song.
The bartender gives him a drink. The drunk downs it, and orders another.

"No way," the bartender says. "Now you've really had enough."

"If you give me a drink, I'll show you something even cooler," says the drunk.
The bartender agrees.
The drunk pulls out a rat, and sets it next to the piano. The frog starts banging away again, and the rat starts singing to the music.
The bartender is amazed, and gives him another drink.

A man who had been watching all this comes up to the drunk and says, "You've got a million dollar act there. I'll give you $500,000 for them right now."

"Not for sale," the drunk croaks.

"Ok, $500,000 just for the frog."

"Not for sale."

"Ok, $500,000 just for the rat."

The drunk agrees, and the man pays him and leaves.
The bartender says to the drunk, "What did you do that for? You broke up a million dollar act!"
"Not really," the drunk says. "You see, the frog's a ventriloquist."