1. I saw a guy "sleep" last night in BJJ class. A move was being demonstrated that involved a choke. Normally if you can't breathe, you "tap" on the guy who is choking you to let him know you need him to let go...in a competition, you lose when you "tap" or, as it is called, you "tap out".
Well for some reason, the guy being choked didn't tap and the next thing you hear is this loud snore and he is out. A woman who is a blue belt came over and lifted the guy's legs and he regained consciousness after a few seconds. That was crazy. It demonstrated to me how dangerous and effective this art really is.
2. Conditioning and flexibility: These are the two most important things I need to improve in right now.