The Folksmen, "Blood On The Coals"

"This Is Spinal Tap" is one of the funniest movies of all time, thanks in large part to the movie's three main stars: Michael McKean, Harry Shearer, and Christopher Guest. They switched gears from their rock & roll roots 20 years later to play folk musicians in "A Mighty Wind"--another great comedy--in a band called The Folksmen. Here they are on Mad TV (a seemingly random venue), with a great performance of "Blood On The Coals":