Today, Gizmo got to go to a soccer game. My mom took him to a local park, where one of the recreational children's leagues play. She wrapped him up in a blanket and carried him around to enjoy being out (he was leashed and harnessed, of course, but the blanket did a good job of hiding his tail, so they could see the game unbothered.)
She says that he was a very good boy at the game, but the whistles and cheering were a bit disconcerting for him. Honestly, if I'd never heard a whistle before, I'd probably find it disconcerting too.