It's rude to break other people's belongings.
Judy and Simon are playing tag in their parents' house.
Simon wants to catch Judy.
Judy stops before getting near the vase and Simon tags her.
Simon bumps into and breaks his parent's vase when he tags Judy.
Judy says it's not fair because she only stopped, so she wouldn't bump into the vase.
Simon and Judy end up getting punished by their parents.