Similar thing happened to me yesterday. Including the F word. Though my mind was screaming unclip!! I did on the right but not in time. I fell off the shoulder (on a trail, at a road crossing) onto the grass but my pedal and other parts of the bike still hit pavement . No road rash at least. My elbow is finally healing from day #1 with clipless.

Almost happened a second time because apparently I have no balance when just standing and waiting. Right side did unclip in time to catch myself, but the top tube still leaned into a rather uncomfortable area of my upper thigh. ouch.

I'm having trouble clearing the nose of the saddle every time I go to step down. When I can't, bike does lots of leaning, making me hop around trying not to slip on left cleat. Don't know why I started doing this. Seems to happen on the slight downhills all the time. Uphill, I stop like a champ. Oh well, practice practice practice.

I feel your pain.