A bit old, but a funny story. I was there and participated
We caused over 30 injuries according to the press, but that's expected when you have over 1200 cadets in a pillow fight. Most of the injuries were due to people tripping and falling on the cement, not from pillows.
Here you go for your enjoyment.
http://www.cnn.com/2015/09/05/us/wes...-pillow-fight/