Nobody knows what Casemiro was doing during penalty shoot-out, the footage is incredible

A fan managed to capture Casemiro's peculiar, if not hilarious, antics during Sunday's dramatic penalty shoot-out between Manchester United and Brighton.

Erik ten Hag's side secured their place in the FA Cup final after beating Brighton 7-6 on penalties.

Seagulls midfielder Solly March blazed his effort over the bar before Victor Lindelof handed the Reds a clash against Manchester City on June 3, which will be a first-ever Manchester derby in the FA Cup final.

Wout Weghorst, who planted a so-called 'kiss of death' on the ball before March's miss, proceeded to sprint towards the Manchester United fans before knee-sliding across the Wembley turf.

One of those supporters in the United end filmed the majority of Sunday's shoot-out.

And after Marcel Sabitzer poked the ball past Brighton goalkeeper Robert Sanchez, a nervous-looking Casemiro was spotted dancing around his teammates [??] as the Austrian midfielder walked towards the centre circle.

Those question marks above are certainly appropriate when you see the footage below. What was he doing? We're not entirely sure at this point, but it made for an entertaining watch.

Twitter user @MufcWonItAll posted the footage alongside the caption: "Casemiro during the shootout [laughing emoji]".

As you can imagine, social media reacted in their droves to the footage.

One said: "Casemiro has absolutely no pressure. He's been in way too many penalty shootouts that he feels penalty shootouts are now side missions. He's having fun."

A second wrote: "He's telling De Gea to make some moves on the goal-line before the kick to make the penalty taker nervous. Serial winner," while a third commented: "Case trying to tell De Gea to move arms and make moves."

A fourth added: "This guy was trying to reduce pressure on his colleagues and it worked. A great leader."

Casemiro's debut season in Manchester has impressed many, including United legend Paul Scholes, who labelled the Brazilian 'the closest thing to Roy Keane' he's ever seen.

"Casemiro has been sensational really," Scholes told BT Sport. "He has great experience, winning so many times with Real Madrid as well, and is invaluable to the younger players around the squad.

"It's almost like he's a coach on the football pitch. You've seen the difference from when he's come into the team and what he's made [happen].

"He has great experience and I don't think he gets the credit for the way he plays. He is a really good passer of the ball, which surprised me a little bit, when you think you saw Luka Modric and Toni Kroos as the playmakers at Real Madrid. But this lad can play."

Scholes added: "I've heard so many times, as well, that's he's probably the best holding midfielder as well. I don't see him as a holding midfielder. He's a proper Manchester United midfielder that gets involved in everything. You see him up the pitch, you see him defending, you see him controlling the game at times.

"He's probably as close to Roy Keane as you're going to get. I think he's been brilliant.

"I think 'holding midfielder' just does him a little bit of an injustice."