It's bad to throw rocks when people are around.
Brad is walking and comes across a large puddle of water.
He wants to skip a rock across it.
Brad waits until no one is around before skipping the rock.
Brad skips the rock while lots of other people are walking in the area.
Brad laughs with delight as the rock skips safely along the puddle.
Brad accidentally hits a small girl in the head with the rock and it knocks her out.