I was rolling last week and I fought this guy in my weight class during training. We ended up in side control with me on bottom. He switch to hon kesa gatame, the judo pin position. He took his gi and covered my mouth trying to make me stop breathing. I managed to escape. 2 days later we are in training and he does the same thing. It wasn't a choke just trying to block my airway I asked if he was trying to suffocate me he says yes. Is this something that goes on? I trained six years never had this submission move performed on me. I have no problem with it but i am a pretty chilled guy. But I just dont want to perform this on someone and have them get pissed off.