It only takes a few key words in a youtube search to find some very interesting gymnastics “bloopers” shall we call them. I found myself in such an unwanted situation in a recent training session. One of my hands was on a somewhat less chalked up part of the bar during a dismount. I was lucky to not lose myself in the air and was able to land safely on my feet (or rather not on my head).
Look here if video doesn’t work.
This kind of situation is not so uncommon. Here is a video of some of the more colourful bloopers of years gone past. I definitely remember Bondarenko’s mishap. Some come out unharmed, some are not so lucky.