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A car accident, a rough tackle, an unexpected tumble. The number of ways to bang up the brain are almost as numerous as the people who sustain these injuries. And only recently has it become clear just how damaging a seemingly minor knock can be.

"Macho Man" Randy Savage, a wrestling star who gained a huge fan following during his time at the WWF and WWE with his signature catch phrase, "Oh yeah," died in a car accident in Tampa, Fla. It is believed Savage suffered from a heart attack. CBSNews.com's Ken Lombardi reports