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."

Bungee Jumping In Mexico
Two Americans decide to open a bungee-jumping business in Mexico.

They set up on the square of a small village. Bob jumps, bounces at the end of the cord, and flies back up by the platform. Jeff isn't able to catch his friend, but he notices he has a few cuts and scratches.

Bob falls again, bounces, and comes back up. This time, he is bruised and bleeding. Again, Jeff misses him. The third time it happens, Bob comes back pretty messed up - he's got a couple of broken bones and is almost unconscious. Luckily, Jeff finally catches him and says, "Holy cow, what happened? Was the cord too long?"

Bob looks confused and says, "No, the cord was fine... but what the heck is a pinata?"