Kinda Like This Contortionist Page...
Lots, of camel's hooves, VW Beetle Hoods (bonnets) and more...
http://community.simplycircus.com/tutorials/acrobatics/conto rtionistshandbook/about_backs_and_back_bending.htm
http://community.simplycircus.com/tutorials/acrobatics/conto rtionistshandbook/about_backs_and_back_bending.htm