Wits: The Mountain Goats play "Rotten Stinking Mouthpiece"

The Mountain Goats (@mountain_goats) performs "Rotten Stinking Mouthpiece" with John Munson (@munsongs) and the Witnesses during Wits http://mpr.org/wits. It's a song that didn't make it onto The Mountain Goats' latest album, "All Eternals Deck."