"You have to talk to this guy. Tell him he's getting cranks, not chokes, that you're recovering from injury and getting hurt and that if you both go a bit slower you'll let him get some controlled, well-executed chokes on SLOWLY, and then tap. Do this for a while until he gets the hang of it ... but if he doesn't, just tell him you get hurt every time you roll with him and you would prefer not to get hurt."
I agree that advice sounds right, but I don't think I'm in a position to be the one to advise or correct him, here. I think my teacher/instructor is already aware of the issue - I am 100% sure that he is aware that this student tends to try and substitute force for technique, habitually - so maybe I will just say something polite and not insulting about other guy when I have a chance.
If I say something to the guy, because (I think I am right in perceiving this) he feels competitive & possibly threatened by me, I think I would only offend him and come of as inappropriately condescending and presumptuous; also, I think it would only register to him as positive reinforcement of the behavior, if I state to him that anything he does when we roll bothers me or is problematic for me.
"There seems to be at least one guy in every gym that has this attitude, unfortunately. There's a fairly limited number of people at my gym who are into BJJ as much as me, and unfortunately one of them is hypercompetitive and ego driven as well. There are people like that in all aspects of life and you have to find a way to deal with them. Do this guy a favour or something. Befriend him, the relationship might become less competitive and more cooperative - MIGht."
That's valuable advice, to me, meaning the advisement to work on changing the dynamic that already exists between this guy and myself, however unstated or sublimated it may be. FWIW, this guy is not a typical meathead at all. He is an older guy that I think is not at all habitually aggressive and he is not at all fundamentally an asshole off the mat. I think he loves/admires the instructor, and is used to being a top student from his judo and Japanese JJ background, and that this has something to do with the dynamic between the guy and myself.
My perception's that this guy views me as a threat, somewhat personally/physically but more in terms of hierarchically - some of our dynamic is probably grounded in that (this is my "read"). In that sense, what you say in terms of addressing the dynamic between us is definitely on the mark. It's something I can do, to try and address that, but I have some doubts as to whether this guy can be taught to roll light until he reaches a higher belt level, because he is trying to prove himself to his hero (the instructor) and get to the next belt level; also, I think his place among the other students, in their minds, is probably an issue for him. At least that is my perception. I realize (and I think some of the responses above support this) that people will tend to think I am self-projecting when I write these things, but I am not concerned at all about my place in the class hierarchy, and I am not concerned about being over or under anybody within it. I also do not have any problem with tapping to anybody, but I do resent it when other people attack as though getting a tap were the only thing that mattered (where, in a way, they would be almost as pleased if biting were a legal/valid technique, and they got the tap by biting you). I don't attack anybody else in that spirit, and I think it's just wrong, so it irritates - well, angers - me when somebody else greets me with it.
AusBJJ, I will just answer this bit from you, because it seems to encapsulate your goal in posting:
'I would put big money that when you said "lets roll light" you didn't taking a passive position and were unwilling to let the other guy tap you.'
You would be betting the wrong side. The only reason he got the position deeply enough to cause an injury was that I was playing very light, and very passive. Actually, if I had used my own strength and had been working in that mode (of more intense resistance), he probably would not have been able to cause the injury in the first place, because he would not have been able to get his arms cinched tightly. I could have stopped the nekk injury with arm/shoulder/back strength, probably, but that might have caused problems related to the preexisting rib injury.
I have a good idea of how to roll light, and keep myself in check, because the person that got me started is training partner to a pro fighter, so he often has injuries that I have to consider, even as his student & as a novice. Plus, he is my best buddy, so we are always rolling in a mutually cooperative way.
FWIW, I have no problem tapping to people. I don't get tapped much because I got started with a purple belt, rolling one-on-one, and I know most of the basic escapes for the core 5 subs. I also know how to relax and not try and force escapes or subs from rolling with my purple belt friend.
Before and after rolling with this other guy, for example, I tapped to somebody going for knee-on-stomach, to the same guy when he got rear mount, etc. - not subs but just positions that were threatening in terms of my preexisting injury (healing broken rib).
Similarly, I wasn't holding posture with anything approaching full resistance from top position, so I was allowing people to get head and arm control much more easily, and this was allowing me to get reversed and into bad positions very easily.
Although I'm a white belt, the only people that tap me with conventional arm bars or triangles, for example, now, are blues and higher. It's not because I am unwilling to tap to the whites; it's because their technique isn't tight enough to prevent the escape. I think I may have mentioned either on this thread or elsewhere that I don't get tapped much, and maybe that is why you (Aus) are presuming I have a problem with tapping. I don't. I have a problem with people not rolling in a cooperative spirit, though. I always do try to roll in a spirit of cooperation & consideration, so it really pisses me off when others don't - unless they are really much more skilled, because then the sacrifice is worth the educational experience.