Controlled Chaos: The anatomy of a pitstop during the Grand Am Cup race for the winning car, the TPC Racing Porsche GT3 Cup sponsored by Ajilon Consulting. Randy Pobst, in the red suit, runs for the door for the driver change. The man in the dark jacket in the middle hustles the jack to the driver side. Behind him, and coming fast, is the crew member with the tires and air gun.