Marcelo and... Scott?... help Orlando develop kuzushi for his Overhead Sweep off of a Countered Armdrag attempt. If your opponent steps up to block your Armdrag from Seated/Butterfly Guard by stepping his leg up to the outside, grab the Single and use your inside hook to somersault backwards for the sweep. If he sits back with his weight to defend the sweep, drive your chest forward to make him push back into the sweep. Place your foot on his hip to prevent the backstep. If all else fails, you can transition to Single Leg X-Guard or X-Guard for a better chance of success in sweeping.