I figure I should answer this question myself first.

I define most things in elements lately, so I will start by saying laughing is air. Its not just any air though, laughing is air that tickles you from the inside out until you have to make some kind of giggle, or snort or chortle sound. Its the air inside you that insists on escaping and being heard by the rest of the world. Its the air that feels good inside and even better out loud.

Have you noticed that most of the people in the pictures aren't laughing? Perhaps balloon hats are not so funny......

A few of the pictures have people laughing in them, but the don't look as funny with the balloons when they are laughing. *shrug* Maybe they are laughing on the inside! :)