BOSTON, MA (CNN) -- In case you didn't know, Saturday was International Pillow Fight Day.
A group called Banditos Misteriosos organized this Boston pillow fight in a local park.
More than 140 cities were expected to take part, all over the world.
Banditos Misteriosos says more than 1,200 people in Boston participated in last year's pillow fight, making it the second largest gathering of the day.
Fighters were encouraged to bring their pillows, non-feather filled, to parks in their city and let loose.