I borrowed robson mouras super no gi dvds and his half guard has the knee basically flat across their hips, I was told this was an easy way to get your half guard passed. It 'should' be basically straight up to block them coming foward. here's a clip if you haven't seen it https://www.youtube.com/watch?v=U8yGA776MPk is this style unique to him? whats the purpose of playing half guard like that? anyone use this successfully ?should I bother learning this or another half guard game? so many options I don't know where to start.