This view shows how each car has eight flanged drive wheels and eight small up-stop wheels. On the vehicle's centerline, just below the rear axle, is a black metal bracket that hooks onto the lift hill's moving chain. In front of that, and slightly to the train's left, is the long black skid used by the brakes. And just to the train's left of the skid, partially hidden by two pieces of pink track, is the white anti-rollback "dog" which rises up as it passes over the saw-toothed sections on the track. As this piece is raised up by the track, and then falls back down into the track's grooves, it makes the "clack-clack" noise that so many people associate with roller coasters climbing the first hill.