It happens to more of us than are willing to admit it. I did an organized ride this last weekend and pulled into a rest stop planning to stop in one area and pulled one foot out in preparation to stop. At the last minute, I decided to stop in a different area there and turned the wrong way as I came to a halt with the foot I needed still clipped in and the other foot useless for my current conditions of balance. So needless to say I was just a piece of timber being felled and had to endure the moment among thirty or so witnesses.
It was nice though that the dirt and mud on my backside prompted others that passed me later during the ride to start a conversation instead of passing in silence.