Revellers take part in a mass pillow fight in Trafalgar Square on International Pillow Fight Day in central London on April 4, 2015. AFP PHOTO / NIKLAS HALLE'N (Photo credit should read NIKLAS HALLE'N/AFP/Getty Images)
Revellers take part in a mass pillow fight in Trafalgar Square on International Pillow Fight Day in central London on April 4, 2015. AFP PHOTO / NIKLAS HALLE'N (Photo credit should read NIKLAS HALLE'N/AFP/Getty Images)