He hitches his horse, Buddy, up to the car and yells "Pull, Nellie, pull!"
Buddy doesn't move.
"Pull, Buster, pull!"
Buddy doesn't budge.
"Pull, Coco, pull!"
Nothing.
Then the farmer says "Pull, Buddy, pull!" and the horse drags the car out of the ditch.
Curious, the motorist asks the farmer why he kept calling his horse by the wrong name.
"Buddy's blind" said the farmer.
Spoiler:
