Source Code !

At the Start of the source code it starts from a establishing shot to get a good view of New York City. After this shot it goes down alongside the train line, and goes into the train to the main character. In the clip is shows the main character Jake Gyllenhaal being confused of where he was, so in the trailer/ clip the speed of editing goes to about 2-3 seconds an edit and this shows the confusion and worry of where he is and what is happening around him.
Then half way into the clip he goes out into the corridor of the train and then a train rushes past then the train that they are located in train starts to shake and so does the camera and this gives an effect of the fast pasted train. This also shows the anxiety and nerves that he keeps on showing through the clip, so the pace of the edits is reflecting his experience of nerves.