A projectile that bounces off another surface is said to ricochet. You missed when you threw your crumpled paper at the wastepaper basket. Instead, the paper ricocheted off the wall and hit your brother on the head. The battle was on!
As a noun, ricochet refers to the rebound or to the object that ricochets. If someone shoots a bullet and it ricochets off a tree, you can survive the initial gunfire only to be caught by the ricochet. The word ricochet is from the French word of the same spelling. Because of its French origin, the word is still pronounced with the soft French "shay" sound at the end — not a hard "T."