Yes, iamelgringo's reaction does seem irrational but I can relate.

I've been dealing w/ a knee injury for a year+ and recently decided to bite the bullet (it's expensive!) and have it checked out. (Being an bootstrapping entrepreneur tends to have the side effect of having less-than-comprehensive health insurance) When the results of the MRI and X-Ray came in I found myself rather disappointed that there were no tears or fractures. I guess I just wanted a definite answer to why my knee was messed up so I could put a rehab plan into place and get back into running and mixed martial arts. Hearing "Don't know what's wrong. Rest it" was rather frustrating.