If movie magic works, then you watch a film as though the story was unfolding before you live and for the first time on the screen. That is, of course, not the case -- especially for big budget superhero movies where post-production adds essential details to the film. That includes adding in the grunts and growls of fight scenes, re-recorded in a sound booth well after the footage was filmed. For a movie like "Logan," which stars a brawling berserker known for guttural growls, those recording sessions are key.

RELATED: Logan’s Keen Bruised Jackman’s Arm For Her X-23 Audition

Actor Hugh Jackman recently gave his fans a look behind the curtain with a new post on his Facebook page, one that shows him hard at work adding Wolverine's signature grunts and growls. The footage shows Logan running through a forest and then slashing his way through a squad of armed soldiers, and the footage ends with Jackman really cutting loose. You can check out the video below.

Directed by James Mangold, written by Michael Green, Scott Frank, James Mangold and David James Kelly, and starring Hugh Jackman, Patrick Stewart, Boyd Holbrook, Richard E. Grant, Dafne Keen and Stephen Merchant, “Logan” is in theaters now.