Why do bumper cars bounce off each other?
Bumper Car Ballet
Why do bumper cars bounce off each other?

Bumper cars are tiny driving lessons in a shiny, giggly mystery: bonk! bonk! Why don’t they just crumple together and stay stuck? Plot twist: they’re built for the bump.
The first secret is the squishy ring around each car. That thick bumper is usually rubber or another springy material, so when two cars meet, the soft edge squashes for a moment instead of letting the hard parts take the hit.
