You can have a juvenile sense of humor! Just... It's not that welcome here. The downvotes aren't a judgement on your character, just a judgement on a joke that's not appropriate in this context. It's cool. You're cool. Everyone's cool. Just don't make jeopardy jokes.
Actually, I expected this to happen and it's not a big deal. I'll save the jokes for Reddit. The interesting thing is I don't think I've ever seen my karma bounce up and down so much every few minutes.