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Zac Efron struggled to keep up with movie brother Matthew Mcconaughey during pre-film character-building runs and quickly discovered the Sahara star is perhaps the fittest man in Hollywood.

Moviegoers made their voices heard this weekend. Grossing $20.2 million at the North American box office in its debut weekend, the video game-turned-movie fright flick Silent Hill took the top spot away from reigning champ, the horror spoof Scary Movie 4, which slipped to second place with $17 million.