I'm going to laugh about a boy's disgrace
Why would it be funny to see someone get embarrassed?
I think it's funny as hell.
You're expected to be polite to people around you. Openly laughing at someone because they are embarrassed is terrible. Have you thought about being more considerate?
Nah, I think it's appropriate for me to laugh at people.
This is only going to make the embarrassment worse for the boy. It would be fantastic if you told the boy that it was ok, and to attempt to make him feel better about what he did to become embarrassed.