How did Garvey end his dance, and what did he have to say about "dances" when he finished? Chapter 20

Garvey ended his dance by crouching and yelling, "Boo!" He notes that dances don't always have to be serious... they can be fun too.

“Dances don’t always have to be serious,” he said. “Dances can be fun, too. Or they can be celebrations.”