This is one of the sneakier submissions that I will have posted on my youtube channel. It was taught to me by a good friend and great grappler from Brazil (thanks Thiago).

There are not a whole lot of chokes that come from an under grip but this one can come on fast. When performing this choke watch out how much space you give them when bringing the arm around the head or they may turn into you. If you monitor your space effectively enough that should not be a problem, at worst you'll have