Thank you all for your kind thoughts and outstanding comments. Mat, nope didn't have the belt on, just had enough time to get a "death grip" on the steering wheel and hold on for the ride.
Update: Tractor is still at dealer, with the holidays and all, be lucky to hear anything by the end of the week. Radiologist looked at my x-rays and he seems to think I may have fractured something in the knee. Go for MRI on Friday. Hurts no worse than normal. I have more metal than bone in that knee. Just have to wait and see.
Thank each and every one of you for your kind words. They help more than you'll ever know.
joe