Fish can roll, Crystal can Shield, and Engineer can Banjo.
This ol' tune was collected from a strange wasteland, with rolling mutant fish and shielding sentiant crystals. It adds up some intense spice to your everyday banjo.
This is a melody from the Nuclear Throne soundtrack, named "This is it". SPOILERS: Do NOT look up the soundtrack name if you do not want spoilers for Nuclear Throne. (Although its not a new game and people played it a thousand times before)