October 21 is affectionately known as Back To The Future Day.
It's a reference to the classic film trilogy where, in the original film, Marty McFly traveled back in time to in the DeLorean time machine to October 21, 1955.
Here we are, nearly 40 years since the original film and still no flying cars, power laces or hoverboards. No, those hoverboards don't count. I'm talking about the REAL hoverboards. If you know, you know.
But I digress.
To celebrate the movie holiday, enjoy this classic blooper reel from the making of the movies.