...of the moment
How absurd is it that by GPS knows the speed limit everywhere, even has some idea of traffic, yet plots routes like stoplights don't exist, or are somehow magically always green? So dumb, almost unforgivably so.
Newton's Cradle when you pull 2 spheres on 1 side and 1 on the other, and it goes 2/1 1/2 2/1 1/2? I'm sad I don't really see how that works