I'd read that he didn't actually intentionally dye it green, but was bleaching it blonde, and suffered the fate that happens if too much bleach is added to hair that is predominently lighter already, and it goes green
He also got drunk, smoked pot, drove drunk, sped his car, and wore tiger skin trousers whilst having sex with many women ...........all while standing on one leg and playing a flute to 'Drowse' out in public.
Looking forward to your youtube of the same..............in green hair, of course.