You may have seen this already. It's the 67th minute of the Champions League quarterfinal first leg at the Emirates between Arsenal and Bayern Munich. The visitors are 2-1 up and Arsenal keeper David Raya is about to restart play with a short, square goal kick. Referee Glenn Nyberg blows his whistle. He hits it a few yards to Gabriel who, not realising play has restarted (and maybe thinking the goal kick should be taken from his corner of the six-yard box), picks up the ball, puts it back down and passes it back to Raya.