Mason Mount might have walked the tightrope during the half-time of the Dinamo Zagreb win.
Cameras picked up him having a light-hearted conversation with French referee Francois Letexier and his assistants.
Then, the Chelsea midfielder reached out for something. The next thing we see, he's brandishing a yellow card in the officials' faces!
Of course, he might've only done this when he saw that the officials were in a good mood.
Otherwise, he might've shared the same fate as Paul Gascoigne. While playing for Rangers, the iconic attacker jokingly showed a yellow card to a ref who dropped it on the pitch - only to be booked himself in return.
Mount was one booking away from being banned for the next Champions League game - so we should be thankful to the French ref for getting the joke.
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Spotted: Mount's and Potter's reactions to Havertz screamer
Kai Havertz scored a stunning left-footed golazo in the second half of the Salzburg game.
Graham Potter was giving instructions to substitute Mason Mount at that time and the duo just hold their excitement when the ball went in.
Chelsea defeated Salzburg 2-1 and secured qualification for the Champions League last 16.
