Camera Movement : Tracking

In the movie Hidalgo there is the final race scene at the end. Where three of the last horses race to the finish line. They use "tracking" to portray the race and speed of the horses. My guess is that they have the camera attached to a moving vehicle. You can tell because the camera shots are only taken from the right side of the horses so I would assume they have a moving vehicle on that side to catch the scene.  It certainly puts you on edge!