UFC boss Dana White was given a fright at the UFC 277 pre-fight event in Dallas, Texas on Thursday.
As is his custom in the face-offs, White was in the middle of the action - keeping fighters Derrick Lewis and Sergei Pavlovich apart to help avoid any pre-bout fireworks.
Regular joker Lewis chose the moment to flinch his hands and trick White into thinking fists would be thrown in fury.
A worried White fell for the prank and sprung forward to intervene but quickly broke into laughter, embracing Lewis onstage.
(With input from AP)
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