The heavy metal band geeked out over the inclusion of the song in the season 4 finale.
Warning: This article contains spoilers forStranger Thingsseason 4.
How crazy cool is that?

Joseph Quinn as Eddie Munson in ‘Stranger Things 4’.Tina Rowden/Netflix
“We had a backing track and I was playing along with it,” Quinn said.
It’s a pretty adolescent fantasy to be a rockstar, isn’t it?
I felt like one for a night.
It was great having Gaten up there with me.
They really turned it up when they played ‘Master of Puppets’ and the whole crew were there."
Quinn said it felt like a celebration despite his character’slooming fate.
“So it felt like a real celebration.”
EW’sUltimate Guide to Stranger Thingsisavailable onlineor wherever magazines are sold.