everyone else in the park, come out of your seat together

He starts his swing. And when his bat meets the ball with a crack that rattles your ears, you can't help yourself. You, and everyone else in the park, come out of your seat together with one thought. "Is he taking it all the way out?"
-- Prostate Cancer Foundation advertisement on page 63 in Sports Illustrated, Monday May 12 2008

Here's my thought: What was everyone doing in my seat?