NASCAR officials never had to pull the yellow hankies out of their back pockets Thursday.

There were no penalties called and the only bent sheet metal at Daytona International Speedway during the twin 150-mile qualifying races for the Daytona 500 was from exploding tires, a few bad decisions and some minor mishaps.

After being warned by NASCAR president Mike Helton to refrain from aggressive driving or face severe consequences, the competitors were on their best behavior.

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