I usually get DH to stand in front of me and link his hands behind my back between my shoulder blades and hold tight, then i push backwards off him and crunch! More comfortable for me than him pushing on it trying to crack it coz he's quite strong and this way i have all the control. BUT remember if theres something not sitting right you dont want to do more damage, this way works for me but might or might not for you... maybe try it but stop if it hurts? His hands need to be linked at the base of where the pain starts so as you lean back his hands roll up into it. Sorry cant be anymore help!