Weird Al unintentionally does black face

DON'T TAKE ME SERIOUSLY ITS A JOKE I LOVE WEIRD AL I HAVE NOTHING AGAINST HIM THIS IS JUST A COINCIDENCE
context:this is the third episode of The Weird Al show,in wich a bunch of miners break into his home, Al during an argument spreads coal on his face to look like a miner and starts mocking them
AL NOOO YOU CAN'T DO THAT