When something bounces against or ricochets off a surface, that's called a carom. You might enjoy watching the bumps and caroms of the bumper cars at the fair more than actually driving one.
Carom is a verb, too, so you might describe a pinball machine this way: "When you push the buttons, flippers hit the little silver ball, which caroms around the machine, bouncing off the bumpers and kickers." The original meaning of this word is also one that's still in use — it's a game similar to pool or billiards, played on a table with no pockets. It comes from the Spanish word carombola, "the red ball in billiards."