The same year "Dont Look Back" was released in theaters, Pennebaker worked with author Norman Mailer (who would later appear in 1979's "Town Bloody Hall") on the first of many film collaborations. He was also hired to film the Monterey Pop Festival, which is now regarded as an important event in rock history on par with 1969's Woodstock Festival. Pennebaker produced a number of films from the event, capturing breakthrough performances from the Jimi Hendrix Experience, Otis Redding and Janis Joplin that remain seminal documents in rock history. The first of these films, "Monterey Pop", was released in 1968 and was later ranked at No. 42 on "Time Out"s list of the 50 best documentaries of all time. Other performers including Jefferson Airplane and the Who also received major exposure from Pennebaker's work.