Nottingham Forest striker Sam Surridge and his teammates attempted to 'troll' Manchester United while celebrating the forward's offside goal in the Carabao Cup semi-finals.
United ran out 3-0 winners at the City Ground on Wednesday evening to all but book their place at Wembley next month.
Marcus Rashford opened the scoring six minutes into the first leg with a mazy run that started in the United half.
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Steve Cooper's side were at risk of being blown away early on after Antony spurned two glorious chances. Forest grew into the contest, however, even managing to get the ball in the back of the net in the 24th minute.
Surridge slipped away from Victor Lindelof to cooly slot past David de Gea for his second goal in as many games. The 24-year-old thought he'd timed his run to perfection, deciding to rub his goal in the away side's face.
He, Morgan Gibbs-White and Brennan Johnson all closed their eyes and put their hands on their chest while tilting their head to the sky.
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It's the celebration Cristiano Ronaldo adopted in the final few months of his Old Trafford career.
The five-time Ballon d'Or winner busted it out after scoring the winner against Everton, reportedly in homage to how he slept on the team coach travelling to games.
Unfortunately for Surridge and co., the goal was ruled out as the former Oldham Athletic man drifted offside. He and Cooper looked devastated, while Erik ten Hag and his men looked relieved.
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The Red Devils doubled their lead just before the break through Wout Weghorst. Antony saw his shot saved by Wayne Hennessey, which allowed Weghorst to fire home his first goal since joining on loan from Burnley.
United added a third late on through Bruno Fernandes' low drive, with substitutes Facundo Pellistri and Anthony Elanga involved in the build-up.
Ten Hag was happy with the performance but admitted at full-time his team still has a lot to learn in regards to not switching off at the back.
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He told the club's official website: "They changed their system and we didn't read it, we didn't anticipate it, and that can't happen.
"But I have to say that they still did the same counter attacks. We knew that before and it is still a moment where we have to learn, we have to improve as a team. If you want to be top, such moments can't happen."
United and Forest will meet again in the second leg next Wednesday. Before that, United will face Championship outfit Reading in the FA Cup.
Topics: Manchester United, Nottingham Forest
Daniel Marland