I accidentally posted a nude photo of my wife on my FB page.
I was at work and I was rushing because I was about to lose internet service. I wanted to post a different, innocent photo of her but uploaded the wrong one. I realized it right away but couldn't get it down in time. It was up for about 30 minutes before I had service again and took it down.
My wife was embarrassed, but found the humour in it and only a couple of my friends saw it so no foul.