Adam Savage builds a mini cardboard cannon

YouTube
Adam Savage Builds a Mini Cardboard Cannon!
Video from Adam Savage's Tested on YouTube.
https://www.youtube.com/watch?v=NGBytdB5nDw
My class is about to do something unwise with cardboard.
@tobias_lind ยท Steady contributor
Cardboard's an underrated way to mock up a build before you cut anything expensive.