"A mere two hours before the scheduled start of the Firestone Firehawk 600 at Texas Motor Speedway, ... [organizers] "postponed" the race. During practice, drivers reached speeds over 235 mph and experienced 5½ Gs for 18 of the 22 seconds it took to complete a lap. It was reported that 21 of 25 drivers said they had experienced dizziness, disorientation, or other problems after the practice session. Driver Michael Andretti ... expressed drivers' sentiments: "I must say that in my 20 years of auto racing, I've never experienced the kind of forces I experienced here this weekend."