How do people find the superhuman strength to lift cars?

When Lauren Kornacki discovered her father crushed beneath his BMW525i, which had slipped off the carjack as he was working on it, the 22-year-old wedged herself under the car -- and pulled it off her father.

Source: http://pheedo.msnbc.msn.com/click.phdo?i=9f701b61a1ed3afba7d94621788f47e8

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