Here's an example: Let's say you're going down the boulevard at the 35-mph speed limit when Joe Numbnuts turns left across your path. With reaction time and all, you've got one second left, so you do a highly skilled stoppie, bringing your speed down to 15 mph in that second. Your average speed during that one second was 25 mph, and you braked for 37 feet. If you hadn't braked at all, you would have covered that 37 feet in 0.72 seconds. So your highly skilled stoppie and nerves of steel delayed your arrival at the crunch point by about a quarter of a second compared to doing nothing at all. Is that enough time for Joe to clear his big SUV out of your way? Usually not. And few riders have as much as 37 feet in which to brake. Even worse, when faced with death or a world of pain seconds away, most riders do a miserable job of braking and swerving.