Okay, I hope I can get this to make sense, apologies for poor grammar and tragic amount of run on sentences. But, I literally know zero about the technical details of this. So, in those fights were one guy is on the ground (he got rocked, or slipped, etc) and his legs are in that sort of 'I'm gonna up kick you' position, and the other dude isn't jumping on him but sort of wading in there and pushing his legs around (really sorry, but I can't think of a specific example but I know I've seen it) why doesn't he just grab his leg and uhmmm you know, ju jitsu it? I just feel like I've seen this a lot, and I'm always confused because they seem quite vulnerable in that position. The only thing I can think of is the dude standing up doesn't know how to 'jits' his leg or that kind of attack is really risky...or I need to drink less when watching UFC. Thanks in advance for any responses.