Ulzibar Chimed the contortionist from Alegria, Cirque du Soleil, was absolutely correct when she said contortionists have a normal back that is just flexible. Extreme back flexibility comes either from genes, hard work, or both. As for Anna (the girl in the pic), the question is: Is she a contortionist or a gymnast? No matter really. What she and others are able to do is truly an art form. Thanks for sharing the pic.

DavidSr