Swing lightly, and clean up the mess.

From the New York Times this morning:

It may not warrant a special designation from the United Nations, but Saturday is International Pillow Fight Day. Leave your jammies on, grab a soft, non-feather pillow, and head to Union Square for the fifth annual event. The fight, which is timed to coincide with other fights around the world, is hosted byNewmindspace, which produces "interactive public art, creative cultural interventions and urban bliss dissemination." Participants must swing lightly and clean up their mess. All leftover pillows will be donated to two Manhattan no-kill animal shelters to make bedding for puppies and kittens. The fight kicks off at 3 p.m.