Armbar from guard?
I'm a beginner Jiu Jitsu practitioner, and I have a question. Well, I was going over the basic arm bar from the guard with my instructor, cause I wanted to know if I was learning it right, and as I was doing it to him, over and over, he found a way to get out of it. Which is basically, when I unhook my guard to put my left leg against his hip and swivel to get my leg over, he yanks his arm underneath my leg (I would say he overpowers me because he weighs like... 100 more than I do, but in any case...) and out. Well, I got to thinking about a way to avoid that and I came up with something that i've yet to try, but would like feedback.
Mmkay, here we go:
Well, first they'd get in your guard and you would grab their right (your left) wrist with your left arm, and reach across and grab the outside of their upper arm (tricep?). After that you would pull that arm across your chest towards your right shoulder. Now, when you do this, you would unhook your guard and place your right leg as high up on the inside of them as you can (like their stomach, or chest areas. You MUST be able to place your foot flat, or close to flat, on them, so you might need to be really flexible to do it good). Once here, you would kick them over with your right leg and swing your left leg around their head and go for the armbar.
Does this sound plausible at all? I'm going to try it anyways, but I want other's opinions and questions to see if it's a good though or not.
Any ways on avoiding him getting his arm through as well would be helpful!