According to "NCIS" executive producer Charles Floyd Johnson, the idea for one of the long-running police procedural's most iconic motifs arose from an unexpected source: the sound of an old flashbulb camera. A typical "NCIS" episode will hook audiences' attention by bookending sections with black-and-white freezeframes of their respective final shots – a stylistic choice known as the "foof" for the distinctive sound that always accompanies. "I have to give credit, I think, to Bellisario ... Johnson further revealed that, following its implementation into the show, the "foof" was an instant hit on the "NCIS" set. To the cast, he elaborated, the "foof" quickly became a fun question of "whose face gets ... at the end of each act?"