There are always those guys in the academy who use techniques outside of the realm of niceness. I lovingly refer to them as dirty bastards, but I don’t mind this type of jiu-jitsu practitioner, some of them I know very well and like them. They’re the guys who will employ calf crushers, neck cranks, trachea crushes; they’re the ones who will cover your mouth and nose with their hand just to mess with you—dirty.
I actually like going against these guys because they keep you on your toes; they grab your fingers, they try and smother you, to me they’re just keeping me from getting too comfortable. They go off-road, off the curriculum list and this makes them valuable training partners.