Just back the car up, retard. Or, you know, stop after you hit umbrella lady instead of following though to the bumper of the car in front of you. It didn't look like she hit umbrella lady that hard; there was absolutely no reason to panic much less to the point of lead-footing the gas.
By the way, the screams amused me too for some reason.
If it makes you feel any better, it doesn't look like the driver was going fast enough to literally squash her or cause an immediate fatality. Looks like the girl may have been able to get away with a broken hip at the worst.