When I ran across this GIF

It reminded me of rainy days in elementary school.  Since we couldn’t play outside we filed into the film room and the teachers loaded a projector with film from a reel that had crappy audio.  Yup, there was a day when classrooms didn’t have even one television or computer in them and the only way to watch anything as a class was on a film projector.  Anyways, one of my favorites was this Donald Duck piece where he learns how to use the diamonds on the pool table and a bit of math to sink a shot.  I can still remember seeing it the first time thinking, “You mean those diamonds around the table aren’t for decoration?”