Christopher Ming Ryan (The Way We Watch) explains that everything he has learned about Social Networking sites like Twitter and Facebook and creating his own blog, he learned while working as a production assistant in the film business. NEW YORK, May 29 /PRNewswire/ -- Christopher Ming Ryan, an executive producer of internal and external video marketing communications for Wheelhouse Communications, published a feature that explains the basics of how to behave on social network sites Starting at the bottom in Television or Film means being a Production Assistant (better known as a PA).