http://www.newmindspace.com/pillowfightnyc.php

A massive pillow fight in New York City! Feathers fly and teddies soar as we gather for a massive urban pillow fight! Swing and whack as you evade pillow-wielding assailants. Bring a pillow to Union Square and wait for the signal. Pillow fight!

i can't go but i'm sure it will be totally awesome. anyone and everyone should go.