I have a vague understanding of how shock absorbers on cars work, but I've never seen them in action. Enterprising YouTuber ChrisFix mounted GoPros under his truck, showing how the system of shocks and leaf springs interact to keep the ride stable. Particularly interesting is seeing how the system reacts to speed bumps, and how the system changes when he replaces his rusty 14-year-old shocks with new ones.

I had no idea how much movement was going on down there. This makes me want to get under my 16-year-old car and take a peek...or never, ever look and just hope it works out. Anyway, enjoy:

See also: Why Don't Woodpeckers Get Brain Damage? and How a Differential Gear Works.

[h/t: The Kid Should See This.]