I was grappling a bit today and I when I got my partners back, I threw in one hook (left leg) the leg was in pretty tight. So, I went for a short choke and I then went to flatten the guy out all of a sudden I heard a huge pop. To say the least I finished grappling, my leg wasn't bothering me so much. Since then, I have gone to eat, changed my tire, and some done some other little things around the house. I have been walking slower than normal So, I just woke up from taking a little nap (with the Air Conditioning full blast) and my leg is bothering (hurting) more than before. It hurts to straighten it, and I am limping a lot when I walk. Any ideas on what it could be?