I did a track day at Gaydon in 2011 for the launch of the XK R S and we all had instructors sitting with us. Anyhow, I get to 156mph on the straight and the instructor tells me to start braking for a corner that seems about a 1/4 mile away. Then he starts raising his voice saying that I need to press the brake pedal harder and harder. Point being that unless your a race driver or have been trained in high speed driving then the world of speed reduction above normal/road motoring speeds is an alien place to most people. The classic danger is that people think they know what there doing.