Reverse Track Shot:

In this scene(Goodfellas) the camera focuses completely on the two actors in the shot. Outside of the window beside them you can see cars and pedestrians passing by. The effect of the reverse track shot here makes the outside world merely just a blur compared to the clarity presented inside where the two actors are. This could represent the fact that the actor's are completely oblivious to the outside world. Also in the shot we can assume that something bad is about to happen by the way the camera circles in on them. It's not an inviting way of circling in, it's almost intrusive and ultimately menacing