Would not call it dim mak. I would guess he was trying to show how in his style he wants to attack points with his fu jow.
Sounds good in theory but would it be the best thing to do in a real fight with a really sweaty person trying hell bent to nail you? If he could, all the power to him. But most people will not have the development let alone the mentality to just move in and grab someone.
I like grabbing with claws, from South Mantis, but I pretty much hammer fisted people when I had to when my club security job had to deal with violent patrons.
Keep it simple and whack em hard.
Works for me.
In Boston,
Dale Dugas
Mouth Boxers have not the testicular nor the spinal fortitude to be known.
Hence they hide rather than be known as adults.