Luka Modric uses the outside of his foot better than any other player in the world. So he used the outside of his right foot to hit an absurdly good ball to Gareth Bale.
Gareth Bale is one of the best around at: 1) running fast 2) taking a good first touch at full speed 3) scoring. So he ran fast, beautifully chipped the keeper and put it in the goal.
And when you combine those two your jaw drops.