Average reaction time for humans for a visual alarm is 1/4 second. So more than a second left. And that's a second at the current speed. At 60 mph (was that the speed?), that's about 25 meters. With 1 g breaking for 1 s, the car's speed could have been reduced to 27 mph, and the person on the street would have had almost 0.4s more time to jump away, alerted by the sound of the car breaking.
Reaction time is only part of the picture. First you recognize the issue. Then you have to move your body. In court they generally use 1.5 seconds for all of this. Your best case is .7 seconds, but this situation was clearly not the best case - even if the human had been paying attention it would be much worse.
