Robson Moura, the grappling encyclopedia as I like to call him, is just plain amazing. When I met him last year it only solidified those feelings even more. You can ask him just about any question about grappling and he will have a logical and technical response or demonstration for you. One thing I admire about Robson is that a majority of his techniques are advanced basics - for example, his reverse kimura demonstrated in this video. Watch the master at work and test it out on that first day white belt tonight!