This is not a drill! Matt Pike of High on Fire/SLEEP and Brent Hinds of Mastodon are apparently working on some music together! The photo was posted by Hinds on Instagram and then shared on the High On Fire Facebook account. Mastodon is working on new music, with a new album expected in late 2020 or 2021. High on Fire is still touring behind their epic 2018 album Electric Messiah (eOne Music) The caption teased “something special for all you guys! Stay tuned for more photos,videos&tunes Who knows what these guys are kicking up together, be it music for their respective bands, or some new supergroup. But it might be really amazing in any case when you get these two greats of guitar together.