As had been the case in previous practice days, it was now Andretti’s turn to go out in the STP Lotus-Ford and top him. Unfortunately, as Andretti built enough speed to make his first ‘flyer’ lap, the right-rear hub carrier collapsed and the wheel separated from the car, which then backed into the Turn 4 wall extremely hard. By the time it came to a halt, the new Lotus was a total wreck and Andretti, who had not yet adopted the new full-face helmet, was slightly burned on his upper lip and the tip of his nose.