Those injuries in the main crowd had to be terrible, because it's not just the car, it's the instruments and the people around you. There would be a domino effect of broken bones and objects being thrown around, all while some madman just keeps pushing forward.
I can only hope 5 is the most that die, but even if that's the case, there will be people left disabled for life due to this creep, and the most the law can do is stack on another "attempted murder" charge, the same as if he had just brushed someone with the side mirror.