Shooting a movie can be a grueling process for everyone on set. And one way that directors can make it easier for everyone is to play music. Though the choice can vary from director to director, most would agree that these productions are a lot easier to go through if everyone is loosened up. And director Taika Waititi made Thor: Ragnarok a lot of fun with shifting the franchise in a new direction with the heavy metal vibes.

Geeks of Doom recently sat down with fellow members of the press at the Thor: Ragnarok junket, where we learned more about the process of making the film, and the music that played while on set. But as for the film’s heavy metal look, Waititi said he had the full support of everyone over at Marvel Studios. In doing so, he gave us an absolute bombastic film that looks like it was pulled straight off a heavy metal cover art and tons of fun.

But that isn’t the only musical inspiration behind Thor: Ragnarok. In fact, there was another band that helped influence the film. And I use that term very loosely. There were a couple of Yo Gabba Gabba songs that helped the cast get through the production. Find out more about this in the full story below.

On the franchise’s new shift in tone, it was an idea that Waititi had since the beginning when he was in talks to direct. “If you would describe all of the characters in this film to someone, it deserves to have all of that color, and all of those crazy, curvy designs.” Waititi described. “It’s a bombastic concept that you can’t hold back, it’s all in or nothing.”

Waititi said Led Zeppelin’s “Immigrant Song” was the initial part of the pitch. “Usually filmmakers would come in with clips of other films, and say ‘here’s what I have in mind.’ Sometimes they are not good. Most of the time, they are okay. His was amazing, and was scored to that Led Zeppelin song,” Marvel Studios President Kevin Feige said. “From the beginning, that song, kind of defined what Taika was going to do with this. It’s in the trailer, it’s in the film, from one of his first instincts of this movie, is very impressive.”

When asked about what kind of music was playing on set, the cast said they remembered hearing a lot of Led Zeppelin, David Bowie, and Lou Reed. That’s when Blanchett threw in Yo Gabba Gabba, with Waititi then singing “Don’t, Don’t, Don’t Bite Your Friends.” It’s something that the director recommends.

“That was my entrance into Asgard, was don’t bite your friends,” said Blanchett, adding that it was her theme song during the production.

On the score of the film, Waititi said they were extremely lucky to get Mark Mothersbaugh of Devo. But as aforementioned, the heavy metal feel had been a part of the pitch since the very beginning. So the score was a bit of a reflection of that. He credits Mothersbaugh for the “spirit of Ja Soundscapes, music, the companies, those spray paint thing you see on Venice Beach of like, pyramids, and like seventeen moons and you know, like – like kind of just good fantasy music with synthesizers, and arpeggiated rhythms.”

The director also mentioned Nigeria and William Omnibus as inspiration for the film’s feel and score.

Thor: Ragnarok opens in theaters on November 3, 2017.