This girl's face hasn't registered the calamity yet. What an oddly jubilent expression to someone eating crap right in front of you.
She's still smiling... OK, her face still hasn't changed and the guy across from her is doing the same thing. C'mon, people!
These front three people are most expressive. Two of them are laughing, while their friend points to the victim, you know, just in case we don't see her.
This is what joy looks like. In case space aliens need a visual definition "glee," just show them this photo.