GW Rule #24

Do not laugh too loud or too much at any public spectacle

PEEVES

Try not to make the public event about you by singling yourself out.  Every dog has their day but show some dignity.

MADAMA

Balancing your public response to the situation is kind to the others in attendance.

SANDRA

Have you ever been to a movie where a single person is laughing a lot louder than everyone else?  It distracts you from the event and can wreck the experience.