Mastodon played “The Motherload” on Late Show with David Letterman last night, and not surprisingly, they crushed it. Brann Dailor’s vocals sounded, for the most part, spot on, and he even paid tribute to Boston singer Brad Delp via a t-shirt. In fact, the biggest difference about the band’s third and most likely last-ever performance on the show was Brent Hinds’ afro and ’70s-inspired shirt. Hey, it’s close enough to Halloween, isn’t it? Sadly, there was no twerking.