Turning a very sharp corner at too high speed. Prematurely alternated the left/right pedal up/down status in anticipation of the next corner and it clipped the ground. Bike somehow managed to stay upright but turned towards the hill on the inside of the corner. Needless to say, I ran off the road into the gravel and eventually the hillside. I think there's still an imprint of me there somewhere...

[edit for spellen]