I've been playing a lot of butterfly and 1 LX the last week or two and when steps over my "non-active/non-butterfly hooked" leg", I've been grabbing their ankle and putting my shin on their inner thigh to essentially immobilize that leg almost like you'd use the lapel in a gi. It seems to stop most of the guys and helps me initiate sweeps right into combat position. Is there a name for this modified guard? Does anyone know what I'm talking about? I also pull it from DLR sometimes when someone tries to stuff my knee on my straight leg. Thanks!