Teflon-coated tinsel: what does it take to kill a Hollywood career?

Teflon-coated tinsel: what does it take to kill a Hollywood career?
Mel Gibson’s career is teetering on a razor’s edge of oblivion and redemption, as last week’s Hangover 2 kerfuffle illustrated, while Charlie Sheen apparently has an all-powerful immunity card to protect him from his own naked, raving allergic reactions.
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