A man is out in the country when his car breaks down

After a while a group of guys in a pickup stop to check on him. They help get his car started, but then they beat him up, take his clothes and wallet, chain him to a tree, and take off with his car.
He’s facing the tree, so he can’t see the road, but he hears a car drive up and starts yelling for help. He hears footsteps behind him, and someone asks, “what happened to you!?”
“These guys stole my clothes, my money, and my car, and left me here! Help!”
He hears the sound of a zipper and the guy says, “man, this just ain’t your day.”