Songfacts®:

• OK Go frontman Damian Kulash said of this futuristic dance-floor banger to Purevolume: "'I Won't Let You Down' is the closest that spaceship OK Go has come to the planet disco. We were playing around with beats and grooves and stumbled upon one of those moments of alchemy where a ball of light just jumps out of the sound. Suddenly there was a flash of Jackson Five and Diana Ross and we knew we had something worth chasing."
• The song's music video was shot in an abandoned warehouse in the Japanese city of Chiba, near Tokyo. The visual was directed by OK Go's Damian Kulash and film director Morihiro Harano. It features the band members riding motorized scooter chairs called UNI-CUBs made by Honda, which paid for the film. The clip was filmed in one single shot using an octocopter, a custom "multi-copter camera," which was developed for the project. It took approximately 55 attempts to get it right.
  
  The video pans out over the city of Tokyo for an extra thirty seconds of silence at the end, which the director said was inspired by the Beatles' outros. "You know how, in some of their albums, a bonus track starts to play," Harano told Billboard magazine. "I wanted something that packed a bit more entertainment even after the main part was over."