We used to call that ‘gouging out’Geezus that ol boy is unique af. And playing with all fingers is totally rad #wizard
I actually saw him live at a club in san fran late 70's. My main memory of it is watching an aquantaince I went with nod in and out on heroin. So weird. He'd wake up from slumped over on the table and cheer wildly for 5 or 10 secs then pass out again.