Capturing a Wookie can be dangerous business. Just ask PFD. The distinctive growl of the Wookie is just one of the many sounds captured by Greg and PFD for the sixth film in the “Star Wars” series (Episode Three, “Revenge of the Sith”). Greg recorded sound effects that would become an element of the Wookie language. In addition to the Wookies, PFD provided dozens of effects that became Star Skiffs, Force Sticks, various weapons, atmospheres and other space paraphenalia in the film.