These might help:
http://www.americanlemans.com/fanfrenzy/forthefansGlossary2.aspx
Hat Dance: The ritual of photos taken after a race, with the top three finishers changing sponsor hats for each photo. In ALMS racing, the victory podium can be crowded with the top three teams from each of four classes and two or three drivers per race car depending the length of the endurance race. The ALMS recognizes each class individually with the overall winner/class coming last.
Hustling the Car: A driver's ability to push the race car to the limit, even if it is not handling well. A critical factor on the road racing circuits on which the American Le Mans Series runs.
Line: At any ALMS race track, simply, the quickest way around a race circuit. To run the fastest racing line, a driver must take advantage of all of his abilities as well as that of the race car -- taking advantage of a racer's braking, cornering and acceleration techniques.
GROOVE: The clean line that provides the fastest way around the circuit. the groove can change during the course of a race depending on track conditions, e.g., heat, cold, moisture, etc., as well as oil, water and rubber from the race cars.
MARBLES: Small bits of rubber that have broken off tires during a race. 'Marbles' are usually found in the corners of American Le Mans Series road racing circuits, often gathering on the outside of the racing line. If a race car happens to get off line and runs over 'marbles,' it can lose control or spin or crash.