The new trailer for a new mixed martial arts documentary pulls back the curtain on the sport, through the eyes of fighters like Montreal-born GSP and Ronda Rousey

“The Hurt Business” trailer opens with a simple question: “Have you ever felt bad about hurting anybody?”

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The two fighters are joined by a slew of other MMA names, including: interim UFC Light Heavyweight champion Jon Jones, legendary fighter Chuck “The Iceman” Liddell and Canadian journalist Ariel Helwani.

In the documentary Georges St-Pierre, who starred in “Captain America: The Winter Soldier”, explains his motivation to compete: “I don’t enjoy hurting people… The only thing I want is [to] be the best in the world.”

Ronda Rousey, who has arguably become the UFC’s biggest star, says the competition transcends gender: “It’s not a man’s thing or a woman’s thing. It’s natural, and we’re all compelled to do it.”

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The film is directed by sports documentarian Vlad Yudin and presents stories of how brain damage and injuries threaten the lives of some athletes.

It hits theatres this fall.