Hey there Gecko, and welcome to BJJ.
What school do you go to? Most reputable schools don't allow neck cranks because they are so dangerous.
Also, I've found that the schools where the teacher is knowledgable and sensible, that attitude tends to filter down through the students, and eliminate the d!ck element... So if you have a school where people are slamming on shoulder locks and neck cranking students who've only been there for a month, I'd be REALLY cautious about going back there. Ever.
Oh, and to answer the bruise question, no I have never had bruises like that. I get little bruises all the time, but they're caused by the material of my uniform twisting and pinching my skin as I move.
__________________  |