I get caught in the Bow and Arrow choke all of the time. My defense for the back mount is pretty good, so my upper level opponents will go to this choke because it gives them an option for an armbar, as well as changing the angle on the choke attack to negate the typical back mount defense (removing one hook and sitting on it...)
My problem has been, what to do when I feel them go for the Bow and Arrow choke? I
Check out this very simple, yet very effective defense!