I did this masssive pillow fight in amsterdam one year and it was soooo much fun i have to try it in melbourne!!
Basically you take a pillow and theres a count down and then you and all the strangers there hit each other with pillows!! its great! :)
heres wat the website says:
Join us for another wonderful pillow fight! Bring your kids, and soft pillows.
Please avoid feather pillows if possible. They make a huge mess.
This is a LEAVE NO TRACE event!
On Saturday April 6th we will once again celebrate World Pillow Fight Day with a massive pillow fight