Not the gang style shooting, the kindler gentler photographic kind.
(legal disclaimer: Do not break the law to accomplish this shot- utilize a designated driver)
The only problem with taking pictures from the bus, train, or passenger's seat is that it makes it harder to tell that the picture is taken from a vehicle ...
it really leaves it wide open, self portrait jmritz style, blur, movement, street shots, or cityscapes,
@Steve- from a moving car? damned good- but I would have supposed your drive by to have been from a cycle.
This is a good example of in lane perspective that can usually only be achieved in a vehicle(on highways or over bridges where there are no pedestrian access points.)
