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UFC star Ronda Rousey was a guest on Jimmy Fallon’s The Tonight Show Tuesday and the late-night host asked her to demonstrate her infamous armbar hold on him.

“They call you the arm collector,” he says to the UFC bantamweight titleholder. “Because you almost snap people’s arms in half when you’re fighting.”

A very nervous Fallon then chooses a safety word and holds his arm out for Rousey to “safely” show off her MMA maneuver, known in judo as a jūji-gatame.

She then pushes Fallon’s arm back, forcing him to tap out.

Rousey was chatting with Fallon about her upcoming autobiography and her acting roles in Fast and Furious 7 and Entourage.

Read next: Why UFC Champion Ronda Rousey Won’t Fight a Man

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