To celebrate yesterday's launch of its Air Presto Ultra Flyknit, Nike has created a unique video builder that allows users to create their own version of "Instant Happiness." You start with a unique "Presto Personality," then add customizable options that include different thematic settings and the color of the Flyknit background. Go to nike.com/instanthappiness to get started on your own video, and once you're done, you can share the video, download it or turn it into a GIF.