My girlfriend spotted this on Boingboing. It’s 1967 bicycle safety film called One Got Fat.
It has that weirdness that every Sixties-era public service film had and then some. You see, the kids who demonstrate every thing not to do on a bike are all wearing the freakiest monkey masks I have ever seen. It’s kinda effed up. I mean, I don’t like monkeys to begin with, and now they’re riding bikes on public streets. After watching this, I had this twisted dream involving Planet of the Apes and getting scolded by my elementary school principal.