Dear Woman with Braying Laugh,

Yes, I heard you.

From all the way over here.

See? That's me looking up over my monitor, giving you a little wave.

It's not meant to be a wave of encouragement.

I'm sort of tempted, teacher-style, to wander over and ask you if you would like to share the joke with the rest of the class.

Social conventions inhibit me, along with my deep suspicion that whatever it is, it isn't funny at all.

Sincerely, 

Woman who can't believe she forgot her headphones today