So this guy is walking down a back alley when suddenly he hears a voice, "Hey, come over here a minute."
Looking around he can't see anything except this mangy old greyhound tied to a shed in someone's yard.
"Yeah, over here. " Says the greyhound, "Look at the state of me. I'm stuck here in this yard when I could be out there winning races. I used to be a champion you know."
The guy looks on in astonishment. A talking greyhound, this could be his ticket to millions. Everyone would want to get to see this, TV shows, maybe even films. This is my chance, he thinks, and walks up the yard to speak to the owner.
As soon as the owner opens the door, the guys asks, "Can I buy your dog?"
"Sorry mate." Says the owner, "You wouldn't want that old mutt."
"No really, I do" insists the guy.
"Well, if you really want him," the owner goes on, "I can let you have him, but I've got to tell you you're making a big mistake."
"Why's that?" the guy asks.
"That dog's a liar. He never won a race in his life!"