PT with seat belt jammed

For reasons beyond me, the wife wrapped the seat belt on the
passenger's side around the back of the headrest on our PT Cruiser.
Now, it is locked, wrapped around the headrest. Is there any sort of
release for the belt locking mechanism? Or perhaps a way to remove
the headrest so we can get it back to normal?

Much thanks.

 

Is it locked like the "G-force" sensor has locked it, or is it just
jammed? If it is jammed, sometimes pulling on it a little will release
it. If the sensor has locked it, the other belts should be locked too.

-KM