Ahh, the storied deep half guard. Many grappler hath made boastful claims of his prowess in its mysterious and technically challenging ways. Yet, few hath guards that can withstand worthy adversaries. Boast not, grappler!
I don't know why I'm talking in a weird pirate-y lame tone. It's been a busy morning. Here are the facts: Stuart Cooper continues to kick more ass with his films, and Ryan Hall continues to be one of the best athletes and educators of the modern guard game worldwide. Learn from him, if thou likeths ... or something.