I believe this is part of the dreaded Arm Pump situation, where the rider is managing both throttle and brake lever at the same time.

Back on the front brake with a firm grip.

Preparing to enter a right turn, I think in his mind it’s the final corner at Losail.

Right knee is coming down as the right elbow’s drop moves the hand askew to the rider’s right side.

At full lean to the right, instead of the fingers adjusting for shoulder position, the right wrist takes the strain.

Leaving the corner and onto the straight, full gas, right?

Not quite. THIS is full gas. Notice how low the wrist is relative to the throttle. I don’t know if the rider’s thumb is in this position at 200+ mph. I rather doubt it. But you can see how much throttle movement is required to reach full gas, I suppose to allow the rider more precise adjustments between closed and fully open.