Slow play clamp down (on 18th)

To be fair to Bryson though, as a physics major who applies advanced science to every shot, he has a lot more data to process than most players. It might just look like a straight forward fairway iron distance selection from the yardage book to us and for most of his fellow pros. But for him, when you are mentally doing all the calculations for elevation vectors, wind speed, boundary layer shear forces on the golfball and the different altitudes it will be at on its trajectory, the complex interactions of ballistic parabolic motion and the aerodynamic surface friction of the ball surface and dimple pattern, air temperature, air density, and dew point influences, as well as landing zone probabilities, failure modes effects analysis, and coefficient of restitution of the green itself and grass friction factors and their influence on spin ball touchdown dynamics, its not really realistic to expect him to do that in 30 seconds.