Check out this backroll sweep from the half guard with Yuri Simoes! You can catch the full series at: http://bjjlibrary.com
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That's an awesome grip! Can't wait to try.
Very nice 
I tried it today but could not get the belt grip. We'll see tomorrow. I love these types of half guard sweeps.
Robson shows some moves with that grip on his 93 guard DVD, but can't recall him showing that particular sweep. Looks like a belt grip variation of the Shaolin sweep (love that sweep, though it's rare to see it any more).
James