For teenagers with a particular psychological profile, traditional sports don’t provide enough excitement. This ABC News program looks at the structure and chemistry of the adolescent brain and shows why certain teens develop addictions to danger - seeking thrills by leaping between rooftops, riding on top of fast-moving cars, and other outrageous pursuits. Dr. Frank Farley of Temple University - a psychologist who has studied risk-taking behavior for more than 30 years - outlines ways to identify the so-called Type-T personality at an early age. He also illustrates methods for engaging teens in organized activities that channel their energy away from adrenaline addiction.

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