So, it's your contention that Sheilds was running and jumping identical to how Dez was - steps the same, jumping at exactly the same point in time, and at the same trajectory, and same velocity and same path, and same height and at the same angle and with the same body lean and turn in the air as Dez, and therefore their bodies would have to have landed exactly the same way, and that the only explanation for them not is that Dez was in full control?
Have you ever played a sport?
There is a reason Dez was able to get the ball with 2 hands and all Sheilds could do was reach back and swipe at it with one hand. Dez made an adjustment before and during the jump that Sheilds did not. The timing of their jumps were different. Their paths to the ball were different. Their steps were different. Sheilds was running ahead of Dez, thus why he reached back to swipe at the ball while Dez was reaching forward to get the ball. And look at the landing - Dez landed on his left foot and Sheilds landed on his right, which also affected how they each fell. Bottom line is Sheilds movements were not identical to Dez's, therefore it's ridiculous to suggest they should have fallen in exactly the same way.
Hell, their landings were dramatically different anyway. Any slight difference in running jumping, reaching for the ball, body positioning etc can account for that difference.