By Nick Romano
Updated July 10, 2016 at 04:51 PM EDT

“Have you ever felt bad about hurting anybody?” This ominous question opens the trailer for The Hurt Business and sets the tone for the documentary: MMA fighting isn’t all fun and games.

Directed by sports documentarian Vlad Yudin and co-produced by Bowling for Columbine‘s Jim Czarnecki, the film pulls back the curtain of the mixed martial arts scene. Ronda Rousey (the upcoming Road House remake) and Georges St-Pierre (Captain America: The Winter Soldier) are two athletes who rose to prominence because of the sport, but their testimonials help reveal a more brutal side.

“I don’t enjoy hurting people,” Pierre says in the trailer. “The only thing I want is [to] be the best in the world.” Rousey emphasizes, “It’s not a man’s thing or a woman’s thing. It’s natural, and we’re all compelled to do it.”

The Hurt Business also features Chuck Liddell, Tito Ortiz, and Jon Jones and is narrated by Kevin Costner. The documentary, set to arrive in theaters this fall, weaves together stories of permanent brain damage and injuries that threaten to tear apart the lives of some of these athletes. See the trailer above.