Z-Bots

The Z-Bots appeared in the 2007 movie Transmorphers and its prequel Transmorphers: Fall of Man. The Primates are robots that originate from an extraterrestrial planet and come in a variety of shapes and sizes. Most z-bots are roughly human-sized while one was several hundred feet tall.

In the prequel, they produced an oxygen-rich wave that caused Earth's machinery to be turned into hominid-sized rogue agents. The most notable was a truck that used its axles as machine guns, flamethrowers and rocket launchers. This particular zbot agent is affectionately referred to by fans as "Axlebot". The robots are known more commonly in the films as "The Machines".