Actually, only basketball has the breaks built in (through the "official's timeouts"). Football's quarters, halves, and two-minute warnings have nothing to do with commercials. Neither do baseball's innings or hockey's periods (although I don't know the rules of hockey that well, so there might be something I haven't noticed).
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"Final thought: I just rented Michael Moore's Bowling for Columbine. Frankly, it was the worst sports movie I've ever seen."
--Peter Schmuck, The (Baltimore) Sun
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