Boarder starts off outside of Nogi’s open guard

Using speed, Boarder crosses over with his right foot…

… and immediately follows up with his left foot to quickly pass the guard…

…and settle into knee on belly

Nogi reacts by pushing off Boarder’s knee and hipscaping (shrimping) away

However, this action exposes Nogi. Boarder grabs Nogi’s arm near the elbow. Note: It is important that this grab be palm up, not palm down as the pic shows

Boarder steps over Nogi’s head with his left foot…

…and rotates and drops down to finish the armbar. It is better on this step for Boarder to drop down, as if on Nogi’s shoulder, rather than to drop backwards, which will make the armbar very loose and much easier for Nogi to escape. It is important to make sure that the armbar is in nice and tight by Boarders hips and knees

Squeezing his knees together, boarder finishes the armbar using his legs, hips and arms