What was the worst physical beating you ever took?

When I was a kid I was swimming by the edge of a pool, and a heavy set five-year-old cannonballed on my face. I got knocked into the water and the force of her weight took my goggles right off.

My tennis coach was demonstrating how to hit the ball at the apex of a toss, and he used his racquet to hold the ball up against the fence. He didn't realize that I was standing behind him, and he swung the racquet back and nailed me right in the lower jaw.