Have you ever accidentally answered the wrong question?

I can’t remember the specifics, but I was thinking about a time on another answer site someone asked about something very serious (it was something like a major natural disaster or a violent shooting)

Someone who was not known for ever being rude or a troll answered something like “LOL! That was totally hilarious! I can’t stop laughing when I think about it!” and then she linked some goofy youtube meme. People were a bit shocked. A few hours later she came back apologizing all over the place because she had two windows with two different questions opened and had put the wrong answer in the wrong box.

I haven’t done that, but I’ve come close and caught myself at the last second. I was just wondering if anyone else had done that before.