"Every five minutes, there's a new thing to make the audience ooh and aah," says David Voss, public relations manager for Barney. "They're up and out of their chairs and are bee-boppin' all around.

Voss was succeeded by David Joyner, whose background as a dancer allowed him to bring a new vitality to Barney’s physical mannerisms: He leaped. He twirled. He kicked.