Having a tough time getting psyched up this Tuesday morning? Look no further than Mastodon's second single from their forthcoming sixth studio album Once More Round the Sun, "Chimes at Midnight." With plenty of time signature switches, rollicking drums, and pummeling guitars over the course of five and a half searing minutes, it's like a shot of caffeine right to the brain. If you dig, you haven't got much longer to wait to hear what else the band have got up their sleeves - Once More Round the Sun is out June 24th. In the meantime, add "Chimes at Midnight" to your case-of-the-Mondays playlist.