Yeah, the way he was acting you would have thought that a ninja snuck on to the field and lopped his leg off with a sword. I thought for sure he was done.
I've torn my MCL and it hurts like hell. The best way I can describe it is getting sliced across the knee with a hot sword. It fuging HURTS. All things considered, it's a relatively minor knee injury in terms of ligament damage, but you'd never know it by the pain when it happens.