A Reinhardt player pulled off an amazing flank and Earthshatter on Oasis by flying through the air. While riding the elevator up to the second floor, Reinhardt timed it perfectly by jumping the charge ability.
The momentum of the elevator let the Reinhardt rise high enough to go over the wall. A rather unpredictable move and the enemy team had no idea it was happening.
With the combination of the charge and the jump, Reinhardt flew over the wall, landed on the other side behind the enemy team. Reinhardt didn't hesitate and threw down his Earthshatter. What do you about this? There's no way you could predict the Reinhardt lands this perfect flank.
Just chalk it up as luck and move on. Overwatch is always about the next battle, and just because you lose one, doesn't mean you lost the match or round. You can turn around unfavorable situations like this one when the Reinhardt got cut off. Don't give up and keep fighting.