Hmmm; you also likely would have had been able to keep both feet on the pedals (and had level pedals) if you'd been out of the saddle in a ready/go position, which I'd suggest you arguably should have been if you were going down a rocky descent with a turn a turn or two. In the past, you've expressed some hesitation about riding out of the saddle. Did the clinic make you feel more secure with that?
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher