Saw this on a web page listing various "dumbest things" people had managed (no it WASN'T me):

I was once canoeing alone in the middle of a lake when the wind began to blow very hard. I was paddling into the wind as hard as I could toward home when I realized that despite my best efforts I was making negative progress. This realization caused such a burst of anger and frustration that the way I thought best to express my feeling at that moment was to hurl my paddle into the water. My only paddle.