A farmer's horse dies and he heads into town to buy a replacement.
He heads to the local horse dealer to see what's available. He looks at several fine horses but they are all way beyond what he can afford. He explains his predicament to the dealer who tells him,
"Come around back, I think I may have something for you"
He shows him a horse that while not as impressive as those out front, seems to be healthy and strong. And the price is less than half the others.
"Before I can sell you this horse," explains the dealer,
"There's something I have to tell you"
"I knew there had to be a catch" said the farmer, "What is it?"
"Well, this horse likes to sit on banana peels." said the dealer. "If he sees a banana peel anywhere, he'll sit on it and you won't be able to budge him for half an hour"
The farmer thinks this over for a while and decides that it's pretty unlikely he'll come across too many banana skins, so he agrees to buy the horse.
He saddles it up and heads for home.
A few miles down the trail the farmer is feeling pretty good about the whole deal, the horse is sure footed and responds well to the reins. He figures he's got a good bargain.
Suddenly, up ahead, he spies something yellow on the ground. As they get closer he realizes that it's a banana peel.
The trail is too narrow to go around the banana peel so he decides to cross to the trail on the other side of the river. He steers the horse into the river and they start to cross.
Halfway across the river the horse suddenly sits down and the farmer is thrown into the water cracking his head on a rock.
Nothing the farmer can do will get the horse on it's feet again.
Soaking wet, bleeding and shivering with cold, the farmer wades to the other bank.
Half an hour later the horse gets back on its feet and walks to shore. The farmer rides it back to the farm without incident.
The next time the farmer is in town, the dealer sees him and asks how he's making out with his new horse.
"Terrible!" says the farmer.
He points to the gash on his head and tells him the story of what happened in the river.
The dealer smacks his hand to his forehead and says, "Oh! I forgot to tell you! He sits on fish too"