From a conversation overheard at a recent BJJ tournament at City College: Guy 1: I heard he is kind of a jerk to his students. Like he yells at them when they lose and stuff. And he doesn't pay much attention to lower belts during rolling, he mostly just rolls with the other black and brown belts. Guy 2: But I heard he is a really good teacher. Guy 1: Oh he is! He is really great at demonstrating technique. Really knows his stuff! I took class there once and it was awesome! Um, guys? If he is a jerk to his students he is not a "really good teacher". He just a jerk who happens to also be pretty decent at teaching jiu jitsu moves. I don't know who they were talking about. But I actually hear this kind of stuff in the martial arts world a lot. Apparently dojos are full of these "amazing" teachers who really "know their stuff". They have won a lot of trophies, these guys. They have important names. You go to their schools, watch them demons...