Riding back to do my second timed downhill run I had one of those "oh-shit-losing-my-balance-can't-unclip!" moments in a rocky uphill, promptly froze up like a re-tard and fell down onto the rocks. All of the weight onto the derailleur snapped the derailleur hanger. And now it's probably my ex-XX derailleur.
Fail. Carnage. Sobbing like a lil girl!