I invented one. Or at least came up with one that none of the pro fighters I trained with had seen, including the instructor who is/was known and pretty respected. It's from NS position. You lock on to NS without covering the inside carotid with your fist, and you slide your body up so their head is about even with your ribs. You get their face pointing off to the outside, and slide your body down pushing their head back and to the side while pulling up on the back of the neck. You keep their chest/body from bridging up with your chest/shoulder still being on theirs a bit. I tapped a couple pro fighters (smaller) with it, and about 50 novices. If anybody wants to roll in SE Michigan, I work out at a Powerhouse and i would be happy to demonstrate.