What Made Sammy Speed?

Sammy, an average teenager, apparently has one flaw: an "attitude" about driving. He mocks those who drive safely, and speeds all over town, encouraged by his girlfriend, who finds his recklessness "manly" and "courageous." Sammy finally bites the bullet, and is killed in a car crash--caused not only by his speeding, says a police officer, but by his "immature defiance of authority" and "unhealthy thrill seeking."