so i am a white belt and today i was rollin with a purple belt of 3 years. i was holding my own most of the time but he had one hell of an armdrag. he was dragging my right arm from bottom butterfly /open guard. the only defense i know is to grab onto his gi pants as soon as i feel both of his hands on my right arm. is there another way to defend that is more efficient because i often find myself trying to pass and not fully aware of where my hand is at (to grab his pants). ideas?