Alan did a phenomenal job as always but I've never seen him struggle that much to keep his stamina. "I Will Return" is a marathon for sure on drums, especially when the venue is hot as fuck. He kept going but I saw the pain he went through and what's even more insane is that after the song and a tiny pause, it immediately goes on with "Deathmask Divine". That's some athletic mastery he has to perform every night on tour.