Not gonna lie. When these sorts of situations have arisen in the past, I find it really tempting to troll. These prompts are such BS that they just invite a BS response.
“Whoo. OK. I’ve never talked about this, but here goes. When I was 12 I used a Hello Kitty doll to kill a man. Wow. Feels great to finally get that off my chest.”
One time at a corporate retreat, we had to fill out each others' "friend books" (I'm not making this up). One question was about our personal motto. I wrote down "Hell is other people" - I think some people took the hint.
“Whoo. OK. I’ve never talked about this, but here goes. When I was 12 I used a Hello Kitty doll to kill a man. Wow. Feels great to finally get that off my chest.”