It was just an upa, Im not even sure if he had an arm hooked or if he hooked a leg on the side he was bridging to, but thats how I was taught to do it. Its a really easy sweep, but its also easy to have your back taken doing it if the guy seems it coming, and all he has to do is basically lift his hips and let you turn and then fall back down on you and he has your back. I unfortunately get caught in that alot when I get mounted, which isn't too often luckily and it's only to guys who are alot better than me.