Pete, I can kinda understand where you are coming from. I didn't fall down the stairs but have had knee problems for the last 41 years. Now at almost 74 years young, I have two artificial knees after 11 surgeries on them. You will recover and be moving forward. Listen to the medical specialists and the PT (pain and torture) people. It's going to take a while to get back to normal, but you can do it. The good thing is (at least here in Minnesota) is it's not riding season.