Originally Posted by dunksby
Not sure, but maybe the second series of shots are heard closer because he changed his position to shoot from a different window.
The difference in the two vantage points is drastically different. The louder round of shots sound like they're coming from right next to the car (hence possibly from a lower floor).
Unless we're dealing with an amazing echo that is bouncing off the buildings that makes it sound so close to the cab driver. Either way, there aren't clear cut answers to this shooting just yet.