Derrick Lewis had UFC president Dana White shook at the UFC 277 weigh-in after a genius prank.
Heavyweight Lewis takes on Russian Sergei Pavlovich on the 13-fight card at the American Airlines Center in Dallas, Texas.
"The Black Beast" is hoping to get back to winning ways after suffering a TKO defeat to Tai Tuivasa in his last bout back in February at UFC 271.
But beforehand, Lewis decided to have a bit of fun with White. He took part in the mandatory face-off with his opponent and got nice and close with Pavlovich.
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The 37-year-old had both of his fists raised and clenched, with White in between the two fighters as per usual.
Suddenly Lewis opened his fists and performed a "pump fake" type action, almost doing a jazz hands gesture.
But White, clearly on the edge, thought Lewis was gonna lash out and nearly had a heart attack.
His immediate reaction was to put his hand in an attempt to block any attack but then he quickly realised he'd be done over.
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With a big grin on his face, he shared an embrace with Lewis, who shook hands with Pavlovich ahead of their war inside the Octagon.
Lewis' antics, which only adds to the hilarity he's produced in UFC, were something of a call-back to Jon Jones and Anthony Johnson producing one of the funniest moments in UFC history.
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Back in 2015, the pair had discussed plans to prank White as they went face to face on stage for the 'Welcome to the Event'.
Jones put his forehead on Johnson's, and 'Rumble' pushed him as White scrambled to try and break it up.
However the two were just playing and both erupted in hysterics. White couldn't believe he'd been punked so badly.
Recalling what happened, Jones said that White had "damn near sh*t on himself."
Topics: UFC, Dana White