She Stepped in Front of the Train

I was sitting at the Buckhead Marta station waiting on the southbound train.  I planned to take a picture of the train as it approached.  The aperture was wide open at f1.8 which creates a shallow depth of field and bokeh, or things in the picture being blurry where the camera did not focus.

Just as the train approached this woman steps in front of me and the camera focused on her.  The result is she is clear and the train is blurry.