ACtually, living in Oklahoma City, OK where this was filmed, I can shed some light. When they talk of coming up to Sheilds Blvd, that is the bridge that he passes under. Start your stopwatch there. He then passes over Walker, and just as he is about to be spun for the first time you will see a street underneath the bridge that he is on. That street is Western Ave. Hit your stopwatch again. You should have timed that amazing run at about 35 - 36 seconds. That distance is exactly one mile for a speed calculation of 100 MPH.