In The White Stripes “Seven Nation Army” video Jack White points to his hand as he begins the third verse to show you where he is from.
The reason he is pointing to his hand is because the bottom half of the state of Michigan is shaped like a mitten and people in the state often point to a spot on their hand when asked where they are from. Jack is from Detroit and that is where he is pointing.
Another quick fact about the song is that the title of the song “Seven Nation Army” comes from what Jack White thought the Salvation Army was called when he was a child.