The wild ocelot mob from Minecraft. It can walk, run, and sit. It is really bad at walking on upward terrain though.

Controls

Throttle to walk or run based on the mode
Yaw to turn
AG1 to go into walk mode
(running has higher acceleration and top speed then walking)
AG2 to go into run mode
(while running you may trip which stops you for 1 second)
AG3 to go into sitting mode
(unsitting makes you jump forward.)

Important note

Follow these steps to switch between modes correctly or the legs will get stuck in weird positions
1. Throttle all the way down and wait for the legs to stop moving
2. Disable the mode you were in before. If you had AG1, AG2, or AG3 active, disable them.
3. Enable the mode you want and throttle up.

DONT have multiple Activation groups active at the same time because the legs can break.

Gifs

Walking

Running

Sitting

Btw this thing was extremely unstable without a gyroscope. Which makes you think. None of the mobs in Minecraft have knee joints. How do they walk? This one used pistons to push the legs up and down, but the mobs in Minecraft don't do that. Every mob's legs just move forward and backward.