A farmer has to go out to plow his rental field about 10 miles from
his farm. To get there he must drive his tractor, and his dog "Old Joe" trots along beside him. Halfway through the plowing, the tractor runs out of fuel.

The farmer wanders out to the road and flags down a ride, which
just happens to be a Ford F-150 Lightning. The driver says, "You can have a ride, but that dog can't get in my truck."

The farmer says, "Don't worry. Old Joe will keep up."

The driver figures he'll show the farmer just what the Lightning can do and lets it rip. Just as he is hitting overdrive, he looks out the window, and sure enough, Old Joe is right beside him. He can't wait to have a look at the amazing dog, so he slams on the brakes, and the truck stops rather abruptly.

The driver jumps out exclaiming, "He's the most incredible dog I've ever seen! But what kind of collar is that he's wearing?"

The farmer shook his head and said, "That's not a collar. That's his a**hole. He's not used to stopping that fast."