Unhitching SuperGlide hitch with truck at an angle

I believe my instruction book said either 14 or 16 degrees off center. But who is carrying a protractor with them? If he must unhook at a more severe angle he can pull the two pins holding the hitch head/plate in the saddle. Then he can lift it all above the hitch and pull out. Once separated he can pull the release lever and slide the head/plate off the pin and place it back into the saddle.