Historical High Fives.

Targaryen thought this was worth mentioning said

There is a belief that the high five started in the 1970s during either a Dodgers or Cardinals game. Some say it started as far back as the 1920s coming from African-American culture and the “low five.” So that means it could be even further back but it hasn’t been recorded or understood as a “high five” today.

What are your theories on the origin of the “high five” and share a picture or gif of your favorite “five” to offer?