This guy is using his finger and thumb to articulate the pick while keeping his palm planted on the bridge. it's a perfect example of what I'm always banging on about. This one trick will help you fix more picking problems that you can imagine. Once you have this down, your entire playing style starts to grow like crazy. it's a very good angle as well so that you can see how hes doing it.
https://www.instagram.com/p/Bl0R8Xmj-WJ/?ut...id=mn0k46bxwhvs

His right hand kind reminds of a high precision industrial machine.

I do use tiny movements with my thumb while crossing strings especially in inside picking, but his technique just seems alien to me

Looks like he's circle picking the alternate ascending part, very good picking and I think his angle is like 75 degrees at some points. Could be what's comfy for him.... or he's watched a lot of Troy Grady lol

Cool to see what can be done with that joint movement only!

I use a very similar technique myself which is why it caught my eye As was mentioned, it does have a bit of Troy Grady about it! Then again, a lot of my playing seems to have a bit of Troys tips in it from before I ever knew who Troy was.
Todd