This was a weird choice for show-opening band, and “In Rock We Trust” was a weird choice for party-starter. Have we learned nothing from all the teams who hit the court to “Thunderstruck”? But we still got “Highway To Hell.” And the sight of Angus Young doing his drooling-gimp-as-schoolboy-as-guitar-hero act will never not make me happy, and it’s nice to see “Thunderstruck”-era bald bull Chris Slade back on drums as Phil Rudd deals with his, um, legal issues. Lady Gaga made a big show of enjoying it, but in the crowd reaction shots, only Blake Shelton seemed to be enjoying this band in proper drunk-dad fashion. I remain amped for Coachella.