Singing the national anthem

[BmorePat87]

You just don't sing it. It's considered respectful to be quiet as it is sung, with no hat on, and your hand over your heart.

In Baltimore, however, the town where it was written (it's a song about the Battle of Baltimore), we have our own tradition where we yell "Ooohhhh" during the "O say does that" part as a nod towards our baseball team, the Orioles (or O's).