https://everything2.com/user/Glowing%20Fish/writeups/knock%20kneed
knock kneed (idea)
An expression for what happens when you are so worried that your body shakes uncontrollably. Of course, normal shaking is a normal response to everything...
knock kneedidea
https://www.livescience.com/7033-ancient-human-ancestors-knock-kneed.html
Ancient Human Ancestors were Knock-kneed | Live Science
Feb 16, 2006 - Learning to walk millions years ago was not without its trials.
ancient humanknock kneedancestorslivescience