yeah i was thinking barefoot its super easy to slide your foot out (especially if sweaty), unless the guy puts a lot of his weight on it, but that may put him off balance. in boxing i agree, the foot is stuck pretty well. also good point on the immobolizing, i was thinking if they step and just try and hold it there, but i guess they could do it when attacking but then it would have to be opposite stances to really do it effectively, even then stepping on the foot while attacking isnt that effective (all it does is make it harder for them to take a full step back, but they can still slide back out of range of the first strike and counter), its just better IMO to focus more on your attack and there potential counter than to add another thing to focus on that wont help much