I mean for this to be a catch all for Demos, Videos, How To's etc. It's great to keep yourself thinking by watching tricks you may have never considered before. I thought I would start with a video because this dude is awesome and he posted a new video yesterday. One of my personal favorite content and shooting methods. If you've never seen any of his videos, you're in for a treat. Primitive Technology Channel can be found here.
His spear thrower/atlatl video was awesome as well. It's nice to know he doesn't always work for 120 days on a project. All joking aside he has undertaken some amazing projects.