1. Accidentally including a home made video of me, my wife and our girlfriend in all sorts of sexual positions, in a box of VHS movies we gave to my in-laws. We made it when we were young to view when we got old.
2. Forgetting to put the BDSM toys laying about in our bedroom, before leaving our house to a house sitter. We had ties on the four corners of the bed, night tables filled with stuff. Nipple clips on the dresser and my wife's whip collection leaning against a corner in the bedroom.
3. Most recently when we moved, we left a box of our BDSM toys in our bedrool and as we were getting into our cars to leave, the real estate agent comes running after us to give us the box and apologized for opening it to see if it was something important.
4. My wife's bikini top coming off in a Walt Disney World pool when I asked her to stand under a waterfall for a picture. The pool was filled with kids. They all started pointing at her. I was photographing her and was frozen in place for a few seconds. She lost her top a few other times in public, sometimes on purpose if there were no kids around such as adult only places.
5. Just remembered another one. My wife and I used to visit a lot of theme parks around the country. One of the things we got into was to lift my wife's blouse to expose her naked breast to the cameras some rides have that take pictures on a big hill on a Log Flume or Rollercoaster type ride. It was surprising how many times the kid developing the pics and posting them on a display board in the hopes of the riders buying them, did not notice and we had a good laugh seeing the pic among the others in full view of the tourists.
One time we were on a new ride and did our usual thing but what we did not know was that they took a picture of two cars at a time, not just ours. When we exited the ride to wait to see if they posted our picture we saw the couple who were behind us in line. All of a sudden the wife says, " Oh, ooh OOH my gosh, look at that". I think we ruined their souvenir picture.

We got caught in public a few times ,as that was our thing for a few years when we both had good bodies. We left sex toys in plain site in hotel rooms and even left some behind. Lots of other little embarrassing moments but these stick out in my memory. How about you?