I’ll start. Teenage me driving up the street to hang out with friends at the mall and passed my younger neighbor and his mom. When I got back a couple hours later, the neighbor’s mom was livid - confronting me for the slight. I seriously had no idea wtf she was talking about and I couldn’t convince her otherwise.
More recent than the other posters here.
I had a job interview for a huge company that I was super excited about. I had applied to an entry-level job position, and they even contacted me and told me that my profile would match a non-entry position more closely, so my process was transferred. I was nervous, but excited!
The interview was remote, which was not usual (this was pre-pandemic! Around 2018 I believe). Once they arrived, I was surprised that they didn’t want cameras on; it was a fully audio-based interview. Whatever, I thought, I’ll just do the interview anyway.
It didn’t go very well, as I was just a silly kid straight out of university with no interviewing experience, but I thought it wasn’t catastrophic or anything. I still do. They asked me a couple of questions about my industry that I had no idea about unfortunately. I still tried to answer as best as I could, but I could tell my answers were not the ones they wanted. The dude was nice anyway and told me “that’s OK” whenever I didn’t know an answer.
A couple of days after the interview, I get a call from a very nice HR lady and she said “unfortunately you were not selected for this position, but feel free to apply for other positions in our company!”. I was a bit sad but wanted to make use of this as a learning experience, so I asked “do you have information as to why I was not selected?” or something to that effect.
She said: "let me see… It says here they were not looking for someone with your profile…
… Oh! Also, you were googling the answers to questions you didn’t know, as we heard you typing"
This broke me. I had done no such thing! I started trying to tell her that was not true (and that if it were, I would have gotten the answers right!). But I quickly realized that it was a losing battle. They had made their decision, and I was just wasting their time. If only they had turned on the camera I could have evidence that was not true. But I decided not to further sully my reputation and just said “Thank you for your time, I hope to talk to you again”.
Since I did not get that job, I applied to and was accepted into a PhD programme so I guess that was a pretty important moment in my life. I am about to finish my PhD and that company is one of my options afterward, so I sometimes wonder if they still have that lie on file.
TL;DR: I got a remote job interview, they refused to turn on the camera, then told me after the interview that I was googling the answers to questions I didn’t know, which I wasn’t. But without a camera I had no way of proving it.