Brain or muscles?
The strong young man at the construction site was bragging that he could outdo anyone in a feat of strength. He made a special case of making fun of one of the older workmen. After several minutes, the older worker had had enough."Why don't you put your money where your mouth is," he said. "I will bet a week's wages that I can haul something in a wheelbarrow over to that outbuilding that you won't be able to wheel back.""You're on, old man," the braggart replied. "Let's see what you got."The old man reached out and grabbed the wheelbarrow by the handles. Then, nodding to the young man, he said, "All right. Get in."

A lawyer returns to his parked BMW to find the headlights...
A lawyer returns to his parked BMW to find the headlights broken and considerable damage. There's no sign of the offending vehicle but he's relieved to see that there's a note stuck under the windshield wiper."Sorry. I just backed into your Beemer. The witnesses who saw the accident are nodding and smiling at me because they think I'm leaving my name, address and other particulars. But I'm not."