I had a similar experience on a dune trip to Winchester Bay, Oregon. Jumped one too many razorbacks apparently but it was the bottom shock bolt that gave way. The bottom of the shock wedged itself between the dogbones and the swingarm and was stuck somehow so that the shock was fully compressed with the rear fender almost sitting on the tire. I got some interesting looks when I rode my KX500 "chopper" out of the dunes and back to the trailer. I got some good pics of it somewhere. Used to have them in the Pitbull Racing gallery.