Well she gets into the car only a few seconds before gunning it. She was just outside surrounded by them and nobody attempted to hurt her So she had no reason to be in fear.

She made no attempt to slowly creep forward and just punched it.

They change drivers at the beginning of the video.

Someone in this thread said they were there and saw them make a total of three driver changes.

It seems to me like this was a coordinated thing, rather than just being a driver who is in fear of a mob.