Because getting whipped is embarrassing and that is why he laughed.
It means that it was a disciplinary action for laughing at their injury.
Jill mom whipped her for laughing at jack head injury as a way of punishing her.
Because after laughing at him, you always had an embarrassing moment which is being whipped.
Because laughing at someone is considered unethical one needs to be disciplined.
Because laughing at somebody is considered bad manners and that is the reason you were disciplined.
Her mom was trying to teach her not to laugh at others' misfortune.
You should not be happy because of others' misfortunes. Your mom was teaching you a lesson.
Your mom just wanted to teach you not to laugh at others.
YES
This shows that your mother wants your to know that injuries are not to be laughed at and they are caused by accident.
Both the crying and the twitching could be pointing towards a painful injury of some kind. See a vet!
Because when young people(toddlers) get hurt, or injured-as you said-they go "BOO BOO"(crying)