When the girl gets hit by the bus about half way through the movie, where did the bus come from? If you rewind to earlier in that same sceen, you will notice that the street from the direction the bus came from is closed off with a power truck or something like that. In other words, there is no way that a bus could have been traveling in the direction it was going and as fast as it was going.
(I know these directions aren't clear, but I hope everyone can see what I'm trying to point out.)