It's rude to laugh at other peoples misfortune
Tom is walking down the street at night, and he sees someone fall down and drop all of their groceries.
Tom wants to react to the situation.
Tom rushes to the man's aid and asks if he's okay.
Tom laughs at the man falling down and does not help him.
The man is grateful for Tom's help and is happy for it.
The man feels bad and is left alone to gather his things.