Got this at their tour with Dethklok. I was living in northern indiana at the time for college so I went to the Aragon Ballroom show they recorded for the DVD. I remember some guy screaming "murderface" and then everyone screaming "murderface" at the camera, and then realizing it was for Mastodon lol. if you look 3minutes and 15 seconds into the first song they play on the DVD, there is me headbanging front row.