The Ultimate Riding Machine
This is a machine that I built to climb trees. It works by gravity: The rope is tied to the center of the tree, so when I get on it it swings toward the trunk. That pushes the back wheel into the tree so that I can ride up and flip over. I got the idea by reading MAKE Magazine and looking at some of the mechanical machines I saw there. Note: Always wear a helmet, and think before you do stuff like this. Being upside is very dangerous.
