illumin8

Can anyone help me out here? I let my friend put her child seat in the back seat and she wrapped the shoulder belt around it. When she was trying to remove the child seat afterwards, she jerked it too hard and the seat belt "locked". The problem now is that I can't get the child seat out unless I get about 6" of slack in the shoulder belt, and the shoulder belt doesn't want to release until I let it retract all the way. Does anyone know of a trick to release the shoulder belt manually?

Thanks for your help.