how about shouting "get out of the way" (twice) and applying (non-existent) front brakes?This is context and not a defence of the little shit.
18mph is give or take 8m per second. He was less than 7m away from her when she stepped out according to the report. That gives him less than a second to register and react. It's possible he didn't even have time to brake under those circumstances.
The average driver reaction time is 2.3 seconds.