The clipping most noticeable on the first action shot is awful. That's a sign of the codec and DR on the sensor. Surfer is even a tad dark in that shot. I'm sure he could've graded and fixed it a bit but it shows a bit of a weakness to me.
It's a beautiful camera with stunning images, but I've done tests on bringing back shadows and highlights in different under and overexposed shots, and couldn't get the results I wanted. Ultimately why I didn't get one yet. Curious to see what it's capable of with 4k raw.