you.............you went to a class.......... buddy farooq i've training in grappling for quite a long time and let's discuss this all right . You see ,the armbar is the easiest submission move everin grappling but from the mount if you do an armbar your opponent will definitely counter it as it is the easiest lock and then you'll end up on the bottom in guard thatis . I don't want to end up on bottom. arm triangle on the other hand is difficult to counter if you use the right technique and also a very good submitter if you will and even if the opponent cunters it chances are you'll end up in side mount but anyway if you just put a little pressure he taps out in 6 secs.............PHEW!! I need some juice........and chocolate muffins