I remember back in the early 80's, in Ozzy's touring band was the legendary and infamous Don Costa.
He played BC Rich Bichs' and Mockingbirds. He was so far out he was eventually fired by Ozzy as he was so theatrically extreme.
He used to have a cheese grater fixed to the back of his bass and right at the crucial moment, he would spin his bass round and shred his knuckles - I kid you not. There was a now infamous picture of that bass in Kerrang!! at that time.
He was also fond of playing using a pick axe and an ice pick too. He was in other bands , M80, an early version of Great White, WASP etc.
He was a good player but he was just so far out there. To this day, 30 years on, I can never look at a BC Rich bass without thinking of Don and that cheese grater!!
https://metal80.files.wordpress.com/2011/09/cronologia-ozzy-osb-batm-02.jpg