A month ago, a female panther chameleon of mine (2 months old), was put in a plastic tote so that I could clean her enclosure. While she was in there, she fell about 12 inches to the bottom, and landed on her feet. I then realized she had a broken spine from several symptoms.

Her back legs "had a mind of their own" they would grab her front legs, and would not let go, causing her to fall.

She could not stand on the top of a branch. Her front limbs would be on the top of the branch, and her back legs would be on the side of the branch.

As she walked, her back legs would miss the branch she was walking on. The back legs would pass between her belly and the branch and overshoot so that the foot would miss the branch (and probably grab onto her front foot).

I took this video, showing some of those symptoms. (skip to the 2 minute mark of the video) You can see how her back feet keep grabbing her other feet.

https://www.youtube.com/watch?v=KkEQmIcJVVA

So now, a month later (3 months old). She is able to walk on top of the branch. Her feet do not overshoot the branch. If her back foot grabs onto the front foot, she is able to quickly let go. Here is a video of her walking

http://youtu.be/TycPXqe7wNM

She still has not fully recovered, as she did fall once in the last week. But she used to fall a couple times a day. So that is much improvement. She is also still much less mobile than her sisters, preferring to move around the cage as little as possible. But she is at least to the point where she is able to get around and not get twisted up from grabbing her own feet.

So fingers crossed she makes a full recovery.