Is this normal?

As I was teaching Luke a little Shel Silverstein poem, Emmett recited the first stanza of a poem he'd read in Highlights magazine. I told him I'd been collecting stuff so that when his friends go back to school, we'd be doing some poetry. He said, "Woo hoo!" and pumped his fist high into the air. I'm pretty sure that's unusual for a kid on their way to 3rd grade...