Video of Metallica guitarist Kirk Hammett joining Journey onstage in Hawaii is making the rounds.

Hammett and the band did a rendition of the fan-favorite “Wheel in the Sky,” and then did Metallica’s “Enter Sandman.”

Hammett shared a photo with guitarist Neal Schon saying, “Had a wonderful couple days hanging out with Neal and the guys from Journey. Thanks so much guys for having me jam on ‘Wheel In the Sky,’ super fun and hope to hang again soon! Much, much Aloha!!!!”

What’s the weirdest music collab ever?