Young Roger Gracie look alike secures heel hook finish. Good view of classic technique.

We can learn a lot from this video. Heel hooking 101. The match starts with a competitor ,who resembles a young Roger Gracie from ADCC 2005, calmly pulling guard. His opponent tries several times to get past but Roger calmly defends. It gets interesting when, after attempting several passing styles Roger's opponent sits to irimi ashi garami (aka straight ashi) at 1:36. Roger allows him to get too deep into the position without starting his defense, against a skilled leg locker this would have been a match losing error. However, in this case,Roger calmly defends but he is definitely in trouble. Roger hand fights to keep his opponent from locking the heel hook. At 1:58 his opponent secures the heel hook and it's about to be game over, but he commits an unforced error. Instead of switching to an inside ashi and creating heel exposure by ashi switches, he elects to come up on his bottom shoulder in straight ashi getting the heel. However, when you do this it makes your hidden leg lite. This allowed Roger to pull out the hidden leg and lock his own heel hook on that leg. Because his was locked on top he could apply much more breaking force than his opponent who was locked on bottom. Thus young almost Roger was able to get the finish. Take note. The best leg lockers in the world are masters of leg lock defense, probably more so than offense. In almost every leg entanglement there is some exposure of your feet to your opponents attacks and we see at lower levels all to often the person who starts the leg lock battle is tapped by a leg lock because he was too focused on finishing that he forgets his own feet. Don't let this be you.