Been there, done that. Could lift up my kneecap and see the joint underneath, and my entire left leg was nothing but one big chunk of road rash.
That was the spill I took in '83 that I mention in other posts from time to time. That's the one that kept me spooked from riding for 15 years.
FWIW, I also ADD the rear bag guards to my touring bikes. Had them on my 2000 RK, PUT them on both my '07 Street Glide and now my '10 Road Glide. I won't ride a bike without them.