John this exact same thing happened to a freind of mine, was going down the trail kinda cased a couple of big woops, and had some sharp pain . Kept riding , next day went to see doc, and his back was same as yours. He is fully recovered and riding again, but takes it easy now. Hang in there.....Thanks all.
Extremely flat light and falling snow + a 20 foot deep by 50 foot wide little ravine= Broken Back.
My L1 vertebra was compression fractured and is currently only 1/2 as thick as it was before the fun.
The good news is that it is a very stable fracture, so no risk of any damage to the spinal cord going forward and should make a full recovery. Flying home as scheduled tomorrow.
-John