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VIDEO: Sean O'Malley's Live Reaction To Justin Gaethje's Head Kick KO At UFC 291

O'Malley's instant reaction was filmed.

Sean O'Malley was watching UFC 291 live and his reaction to the main event was captured on video.

Headlining UFC 291 was a rematch between former interim UFC titleholders Justin Gaethje and Dustin Poirier. "The Highlight" was looking to avenge his 2018 loss to "The Diamond," as well as capture the BMF title. Gaethje got what he was looking for, knocking Poirier out cold in the second stanza with a head kick.

Justin Gaethje lands a head kick to knock out Dustin Poirier in the UFC 291 main event.

VIDEO: JUSTIN GAETHJE SLEEPS DUSTIN POIRIER WITH HEAD KICK AT UFC 291

Sean O'Malley was watching UFC 291 with his coach Tim Welch and some of his crew. "Sugar's" instant reactions to the fights were filmed for his YouTube channel. Just before Gaethje vs. Poirier began, O'Malley weighed in on what could happen.

"I think Justin is gonna come out new Justin and f*cking ━ but it doesn't matter," O'Malley said. "Dustin brings the dog out of mother*******."

Following the opening frame, O'Malley gave a brief assessment of what transpired.

"I don't know, that's a close round," O'Malley said. "Dustin backed up Justin."

The vibe in the room was completely different once Gaethje landed the unexpected head kick that put Poirier's lights out.

"Son of a lucky mother******," O'Malley reacted.

Here's the full video of Sean O'Malley's live reaction to UFC 291:

O'Malley is hoping to have his own crowning moment at UFC 292 on August 19. In the main event, the "Sugar" show will challenge Aljamain Sterling for the UFC Bantamweight Championship. The action will be held inside the TD Garden in Boston, Massachusetts.

UFC MATCHMAKER: 4 EXCITING FIGHTS TO MAKE AFTER UFC 291

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