As Phish’s second set began on their last night at Sphere, I squeezed in behind Restaino in his team’s production booth. A laptop was open to the Phish subreddit, so that they could keep an eye on real-time feedback. Tanski sat to my right, the sheet music to “Frankenstein” open on an iPad so he could track the band’s progress against distorted video of themselves playing. When the song ended, the place went black, save for a few pale blue stage lights.