I have surfer's neck, from 3 years of competing 4A, 4 years to get there, and 20 years of free surfing after that. Nobody of my generation in surfing can look upwards by craning their neck. We all arch our backs like a twist serve.
I can bend over, turn more than sideways, and stare straight up at the sky, but that is not the best position for a high strikepoint on serves. It's a Yoga pose, though.
Would you believe I haven't been able to raise both hands over my head at the same time in over 6 years? Rotator cuffs destroyed, from motocross crashes to overuse throwing rocks and sand dollars in my youth. I can do it if you assist by lifting my elbows..