Where have all the pillows come from?

So here's an idea about how/why the pillows appeared in the lecture hall for our Intro Ad Creativity class.

4 people were misbehaving. one at each corner of the lecture rows. Team at the top is Team Argon dressed in ripped tied die and cowboy boots, Team Billy Goat Gruffs at the Bottom. Goal: To smother the person above/below you with green slime shot from a giant super soaker. It turns out team Billy Goat Gruffs won (good old gravity), but they both left a huge mess! The chairs at the end of each row were permanently smothered in green glob (much like that of slime from the old Nickelodeon TV shows). To hide the remains of their battle, they went to the local thrift store and took up every last pillow then returned to the scene of the crime where they swiftly affixed them with Mary's pointe shoe sewing kit. They plan to return one year later and sew on a few buttons to commemorate the anniversary.