Recently when we where drilling takedowns (I HATE drilling takedowns) and while it was my turn to press, and the other guys turn to defend, I clenched and went for an outside leg sweep and my knee popped as we went down. At first I wasn't sure if it was me or the other guy that caused the loud popping sound as their was no pain. After poking it for a bit, it was me. Sat off mat, felt fine, Walked back home, jumped thru the shower and went to bed, in the morning it was the size of a mellon and I almost passed out from the pain when I tried to walk on it. Since then(4 days later) lots of ice and Apsin/Ibuproffin. It's feels about 75% now, walk fine, still a little swollen/tender, gonna take this week off. If After a week its still bugging me I'll go see a doc. But I figure its about time to invest in some knee protection. I've seen big padded knee pads, and others that have a circle in the front, that I assume support your knee cap. For JiuJitsu, what is the best? what do you currently use? Thanks in advance.