Bob and George are golfing, when a bird flies overhead. "Wow! What a big duck!" Bob says. "That's no duck, it's a goose." George says.

"No, it's a duck!" Bob says. "I say it's a goose!" George says. And so the argument went. "Duck!" "Goose!" "Duck!" "Goose!" "Duck!" "Goose!"

Another golfer behind them, playing the hole, yells, "Fore!" and hits the ball.

Bob sees the ball coming and yells, "Duck!"

George yells back, "Goose!"

BONK.