Having proved his boxoffice might with last year's "The Scorpion King," Dwayne "The Rock" Johnson makes the transition to contemporary action in "The Rundown," a high-testosterone Amazon adventure with a comic slant. The wrestler-turned-actor acquits himself with the required mix of intensity and ease and has flavorful support in his co-stars. Peter Berg -- whose feature directorial debut, "Very Bad Things," was a very black comedy indeed -- pushes things to the limit here too, with uneven results.

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