The Batman Begins star portrays real-life hedge fund manager Dr. Michael Burry in the comedic drama, and his character, who suffers from Asperger's syndrome, is often featured rocking out to heavy metal music in his office and home basement.

One particular scene required Christian to furiously drum along to Pantera's By Demons Be Driven, and the Brit admits he grew rather fond of hard rock during the shoot.

"It was a wonderful crash course, double kick-drum, Pantera, By Demons Be Driven, fantastic song to begin with," Christian tells Screenrant.com of how he prepared for the role.

"This is how (Burry) unwound, this is how he calmed down," the actor continues. "He would listen to it all day long in his headphones, Mastodon as well. His brain is on fire so much that death metal calms him. He's a very different individual to most of us."

Christian had been recovering from a knee injury prior to shooting the film, but he refused to allow director Adam MCKay to bring in a professional to serve as his body double for the Pantera drumming scene, telling the filmmaker, "No, no. It's gonna be all right. Let me just do it."

The actor's dedication to his art and his genuine interest in learning about metal even impressed his drum teacher, Scott Wittenburg.

"(Christian) came in ready to rock for sure," Scott recently told Pitchfork.com. "He pulled up in the parking lot with the windows down blaring - I think it was Earth, Wind & Fire, old funk bands from the '70s, which I thought was awesome. He's into music. He listens to a lot of music, but maybe not the metal thing, but he listens to the loud stuff. Maybe he listens to metal now, I don't know. I kind of had to hip him to the whole 'Dimebag' Darrell (late Pantera co-founder) thing. He seemed pretty into it as he went."

Christian's efforts have paid off - he won the Critics' Choice Award for Best Actor in a Comedy on Sunday (17Jan16), while he is also nominated for the Best Performance by an Actor in a Supporting Role Oscar at the Academy Awards next month (Feb16).