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A harsh reaction to "Freebird" came from the late comedian Bill Hicks during a Chicago gig in the early 1990s. On a bootleg recording of the show, Mr. Hicks at first just sounds irked. "Please stop yelling that," he says. "It's not funny, it's not clever -- it's stupid."

The comic soon works himself into a rage, but the "Freebirds" keep coming. "Freebird," he finally says wearily, then intones: "And in the beginning there was the Word -- 'Freebird.' And 'Freebird' would be yelled throughout the centuries. 'Freebird,' the mantra of the moron."

To understand the phenomenon, it also helps to be from Chicago. When asked why they continue to request "Freebird," Mr. Hicks's tormentors yell out "Kevin Matthews!"

Kevin Matthews is a Chicago radio personality who has exhorted his fans -- the KevHeads -- to yell "Freebird" for years, and claims to have originated the tradition in the 80s, when he says he hit upon it as a way to torment Florence Henderson of "Brady Bunch" fame, who was giving a concert. He figured somebody should yell something at her "to break up the monotony." The longtime Skynyrd fan settled on "Freebird," saying the epic song "just popped into my head."