Kinda like the old blind mule.
Then there was the guy looking for a horse to buy for riding.
Spotted a beautiful animal out in a field while driving and stopped to inquire about possible sale.
Old farmer with very thick glasses answers door.
Guy: horse for sale?
Farmer: that old thing? I'd sell him but that horse don't look too good.
The guy thinks he's gonna pull one over on the old farmer with bad eyesight and get a great bargain, so asks to saddle up the horse and try him out.
Horse all saddled the guy mounts, gives a little kick, and says giddy-up!
Horse takes off running like the wind! Gets to the end of the lane and runs smack into a tree! horse falls one way and the man the other...both knocked out form the impact.
Old farmer starts walking down to where the horse & guy are laying knocked out...gets there about the time the man is regaining consciousness.
Man: "what the hell's wrong with that animal? is he blind?"
Farmer: "I done told you he don't look too good!"