Surely this is open to interpritation and whether the ref decides the back pass was intentional or not.
Also dives on the ball, if it doesnt hit his arms then thats fine only a back pass if he touches with his arms.
The ball still needs to leave the box from a free kick, so i assume the goalkeeper would be asked to retake it and AEA would get a bit laugh from the crowd. possibly booked for time wasting.