A colleague just shared his experience losing his brakes going 80 mph (I must have mis-heard him and he was going the speed limit). He pulled up his hand brake, lightly and alternated from application of light braking and release of braking. He says pulling hard on the brake, he would have lost control. Our parking brake is electronic. What would we do? Can we rapidly push the button on and off? But, that's full-on and full-off, with no "light" braking.