system
Given the following post, respond as if you're commenting on Reddit:
human
How do we use our legs to walk? 

More specifically, how do our muscles, bones, tendons and ligaments work together to make walking possible?
gpt
Falling with Style.

With much practice, our eyes and inner-ears work together to provide the brain with information.  We aren't aware that this is going on, but fun house spinning tunnels mess with our eyes and spinning around really fast messes with our inner ears, both making walking difficult.

We don't "think about walking" the same way you don't think to remove your hand from something hot. You just react.  When your inner-ear (very tiny hairs in a fluid which sway like trees in the wind) says "I am falling left" your brain reacts by shifting to the right.  You are almost always falling, but the brain reacts so smoothly and consistently that you can hardly notice it.  Try this.  Spin around 10 times, then stop, stand on one foot, and close your eyes.  Standing up becomes very, very challenging. 

Walking is just falling forwards and catching yourself over and over again.