Ever get stuck under someone when you go to armbar them? Some people have a real knack for using stacking as a defense against an arm bar.
I’ve been on both the giving and receiving end of this conundrum, and came across this technique/transition as a possible solution. It is certainly not the only potential answer to this problem, and it may not work for everyone, however I have made good use of it and you may be able to as well!
What do you think of this move? Have you used it before? Do you have any viable solutions to the problems that a good stacker can pose to someone who favors arm bars?