Jeramy just called me because the results from the MRI on his knee are in. It turns out that he has torn his Posterior Cruciate Ligament (PCL). His next step is to meet with a surgeon to see if they want to go that route.
Of course, immediately following this news, I made my way to google to learn more. Most of the articles were impossible to actually understand, but this one was pretty good: http://orthopedics.about.com/cs/kneeinjuries/a/pcl.htm