Black Mountain brought "Old Fangs" -- and most importantly, "Old Fangs"'s sweet organ riff -- to Late Night last night. But the best part may be watching the girls in baby doll tops gently nodding their heads behind the band: [videoembed size="full_width" alignment="center"][/videoembed] (via The Audio Perv) Wilderness Heart is out 9/14 via Jagjaguwar.