I think the yellow card was a joke, the Polish FA don’t have any authority over parachutists.
It’s been a while since there have been any new You Are The Ref articles, but I think the actual decision should be a drop ball
The following are the situations in which the 2020 Laws of the Game specify that play should be restarted with a dropped ball:
- the crossbar becomes displaced or broken[5]:40
- the ball becomes defective[5]:46
- an outside agent enters the field of play[5]:53
- a player suffers a serious injury, unless the injury was caused by an offence[5]:67
- a spectator blows a whistle which interferes with play[5]:67
- an extra ball, other object or animal enters the field of play and interferes with play[5]:68
- the referee signals a goal before the ball has passed wholly over the goal line[5]:93
- a player commits a physical offence inside the field of play against any person other than a player, team official or match official[5]:114–115
- after a penalty kick has been taken, the ball rebounds into the field of play from the goalkeeper, crossbar or goalposts and is then touched by an outside agent[5]:125–126
- the ball touches a match official, remains on the field of play, and one of the following occurs:[5]:91
- a team starts a promising attack
- the ball goes directly into the goal
- the team in possession of the ball changes
- the referee stops play for any other reason for which the Laws do not define the method of restart[5]:87.