The Hila Trebuchet
I like trebuchets. Former Pixarian and RenderMan engineer Dan apparently located some plans for building small trebuchets from the Hila Science Camp:
And here’s a short YouTube video showing him test firing four of them. Cool!
Bonus video (unrelated to the above): Dan also posted a link to this video, showing video shot from an RC airplane while people on the ground tried to shoot at it with fireworks: