Joseph Quinn can shred in the Upside Down and the Right-side Up.

The Stranger Things actor, who plays the beloved Dungeons and Dragons-loving metalhead Eddie Munson, jams the Metallica classic “Master of Puppets” during a dramatic scene in the Netflix sci-fi series’ season four finale. And if you thought the performance was all camera trickery, think again.

The Stranger Things writers shared a video on Twitter of Quinn practicing the “Master of Puppets” riff behind the scenes and working on replicating James Hetfield‘s downpicking.

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“Practice makes perfect,” the caption reads.

Along with Quinn’s playing, Tye Trujillo, son of ‘Tallica bassist Robert Trujillo, recorded guitar tracks for the scene.

Metallica previously issued a statement saying that they were “beyond psyched” and “totally blown away” by the “Master of Puppets” placement in Stranger Things. According to Billboard, streams of the song have increased 400% since the season four finale’s premiere on July 1.

As an extra thanks, Metallica sent a Master of Puppets box set to Stranger Things music supervisor Nora Felder.

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