Holzläufer

A wooden machine runs through a deserted, toxic world, powered by the energy of a tree it carries with it. It serves as a safe habitat for a tiny human, who is constantly busy freeing the gears from the tree's more vigorous roots. As the human leaves the wooden walker to cut a root snagged on the ground that has caused it to stall, the growths gain control of the controls and eventually cause the machine to hurl itself off a cliff. While the man and his artificial habitat do not survive, the tree can finally dig its roots into the ground.