A Ball Bearing strategically placed in the Toys in the Hood 1 tunnel.

The Ball Bearing is a Pick-Up that is dropped from the rear of the car. It is an extremely heavy ball that knocks anything in it's path out of the way. It is mostly dropped in corners, dark tunnels, or directly in front of another car. Doing such can change an entire race's outcome.
After dropped, it takes 30 seconds to disappear from the track.