In a few weeks, the Mountain Goats are releasing their new album Bleed Out. Its two singles so far — “Training Montage” and “Wage Wars Get Rich Die Handsome” — both made our best songs of the week list when they came out. Today, they’re back with another one, “Mark On You,” which comes with the threatening chorus: “Can’t trust anybody/ Even the tough ones crack/ Train up a swordsman/ To stab you in the back/ I know this much is true/ I’m going to leave a mark on you.”