On Saturday April 6th, thousands of adults and children all over the world got together in predesignated locations in their respective cities with one purpose in mind - To have a good old-fashioned pillow fight with total strangers!

Now in its sixth year, the hour-long event is the brainchild of an organization called Urban Playground, whose organizers view the pillow fights as a harmless way for people to relieve stress and have some fun. The only rules? No hitting anyone with a camera or anyone not armed with a pillow!

This year, over 100 cities ranging from Washington D.C. to New York (USA) to London, (England) and even Istanbul (Turkey) and Sao Paolo (Brazil), participated in this fun celebration. Judging from the videos, they were all a roaring success!

In addition to this feather-flying event, the organization is also responsible for other fun free events like inviting the general public to play capture the flag on city streets, or organizing massive city bubble battles and even, impromptu subway parties.

Resources: pillowfightday.com