What you missed at PFW was, of course, Blacker Deconstruction.

At Deconstruction, all gather in the courtyard,

Feast on Liquid Nitrogen ice cream,

 And destroy pianos.

There are two pianos, one for the Moles, and one for the Prefrosh. Deconstruction is a contest between the two groups to see who can destroy their piano first. The catch is that while Prefrosh are allowed the use of sledge hammers and crowbars, the Moles can only use whatever they find in the courtyard – rocks, parts of the piano, pieces of wood lying around, ropes…

…and the tree.

Spoiler alert: While the Prefrosh give it their best go,

the Moles always finish first.