When I was about 14 and just discovering internet and yahoo chat, I was talking with a boy from Australia.
I knew the seasons were reversed, so I asked him "when do you have your Christmas then?"
I'm blonde for a reason I take it.
Another time it wasn't so much stupid as embarrassing. Same camp as the fly incident (if you're from massageplanet.net you may recall this), we were to do like a air band thing, and our group got "rock" as a genre. I had clearly asked our counselor if I could break this one little guitar she had brought from Brazil and she said it was ok. this is how I remember it anyways.
So there was like 5 or six of us up on the stage in front of our whole group (4 cabins with about 8 girls in each). The song starts playing and another girl was pretending to smash the guitar when I grabbed it from her and just broke it to pieces all over the ground. There was an absolute silence and I felt like the biggest fool ever! I just kept stuttering that "she let me, it was ok! I asked, she said it was fine". We didn't win the air band competition but I was beat red and no one would talk to me for a while.
At the end of our camping (3 weeks) there is a closing ceremony and my counselor presented the guitar I had smashed (it had been rebuilt and polished) to the head of the camp. It now remains on the walls in the mess hall. All I keep thinking is, "I totally smashed that! And now it's there forever."