Originally Posted by 5kgLifter
I was going to ask about that but you beat me to it
Thanks for looking in. Watching videos around the interwebz, it seems a reasonably common problem with rookie/intermediate sumo pullers. The narrow grip makes the bar more likely to wheel around (especially when using a mixed grip) and I think that arm pull is the weak a$$ way of pulling the bar back in. The correct way to do it is with tighter lats.
This is my theory anyways...