Its pretty funny how say this stupid shit in a fucking MMA board, so not only you don't train, it seems you don't even watch MMA because its quite idiotic for you to question the effectiveness of the RNC
I just did judo in college and been doing either BJJ or Judo for around 20 years after leaving college.
There is not "nerve pinch" involved in the RNC its a blood choke, its just that morons like you who "trains UFC" think the only thing you need to do with grab someone by the neck and pull back, which doesn't cuts blood flow but air flow and partially because the neck is surrounded by very strong muscles, that's why you have retards like
@Fox by the Sea saying that "this guy resisted but the other guy didn't" when presented with a video of a guy doing an RNC properly, its just that there is no resistance because even if you tighten your neck, which helps against the trachea choke (trachea is protected by muscle) the carotids are on the outside.
Its even worse if you go to the ground and continue to pull back, because now the floor is there and you can't pull back anymore, what you need to to is tighten the choke, not pull back, and you tighten the choke by actually not going back but compressing your chest forward.