This one is easy. (Although it's not rec. league.)
Junior hockey. Playoffs. Game 3 of 3. I'm a goalie.
We're on the PP late in the 3rd, down by 2 IIRC. Their guy dumps it out of their zone with a slap shot. The puck hits the boards at about the centre line, and comes right for me. I have a winger curling anticipating the pass.
I go out to play the puck, and completely woof it. Goes right in the net. The groans from the stands of everyone watching. Good god.
That was how I ended my last game in junior hockey. I didn't get kicked off the team or anything, it was the end of the season and I was moving.
It still haunts me to this day. My puck handling skills suck rabid donkey balls. I've always contested it's because I shoot right, and as a goalie, I have to shoot with my left. It's my excuse, leave me alone.