pulled left and right mcl's, not too serious at all but my knees have a lot of issues to begin with so it didn't help much.
most painful was the bruised hip-bone (patrols thought i'd broken it, luckily they were wrong) and mangled face combo. within five minutes my right eye was swollen shut and bleeding from a cut just above my eye, i bit halfway through my lip and my chin was scraped raw. I was definitely a sight when i showed up to class the next day.
funny thing was i'd lied to a prof telling him i was sick that day so i wouldn't get kicked out of the course (who ever heard of a university with an attendance policy?) and when he saw me the next day and asked what had happened to me i panicked and said "I...uh...fell down the stairs." pretty sure the only reason i got a B in that class was that he thought I was being abused.