So I went to the doctor today, and the first reaction he had was "What the hell did you do to your legs?"
So after explaining what had happened, and reciting my parkour pitch (still need to work on the wording: I still get the worried glance) he examined it and had me sent down to x-ray just in case. Gladly, no fracture or bone scrape; the tibia and fibula are strong bones. I really just need to take it easy until it heals completely.
But bloody hell, it still hurts to walk. >:(