Editing Yoko Ono (section)

===Experimental films, 1964–1972===
Ono was also an [[experimental filmmaker]] who made 16 films between 1964 and 1972, gaining particular renown for a 1966 Fluxus film called simply ''No. 4'', often referred to as ''Bottoms''.{{sfn|''The Rare Films of Yoko Ono''|2004}}<ref name=BioB>{{cite news|title=Yoko Ono Biography: Films |url=http://www.thebiographychannel.co.uk/biographies/yoko-ono/films.html |url-status=dead|archive-url=https://web.archive.org/web/20140202100643/http://www.thebiographychannel.co.uk/biographies/yoko-ono/films.html|archive-date=February 2, 2014 |publisher=Biography Channel (UK)}}</ref> The 80-minute film consists of a series of close-ups of human buttocks walking on a treadmill. The screen is divided into four almost equal sections by the elements of the [[gluteal cleft]] and the [[horizontal gluteal crease]]. The soundtrack consists of interviews with those who are being filmed, as well as those considering joining the project. In 1996, the watch manufacturing company [[Swatch]] produced a [[limited edition]] watch that commemorated this film.<ref>{{cite web |url=http://www.swatch.com/zz_en/watches/finder-detail.sku-GB168.html|title=Film No. 4|publisher=swatch.com|access-date=February 5, 2014|url-status=dead |archive-url=https://web.archive.org/web/20131217183705/http://www.swatch.com/zz_en/watches/finder-detail.sku-GB168.html|archive-date=December 17, 2013}}</ref> She also collaborated with Lennon on the film ''[[Fly (1970 film)|Fly]]'' (1970), the soundtrack of which appeared on her 1971 album ''[[Fly (Yoko Ono album)|Fly]]''; and on ''[[Up Your Legs Forever]]'', a quasi-sequel to ''No. 4''.<ref>{{cite book|author=Keith Badman|title=The Beatles Diary Volume 2: After The Break-Up 1970-2001|url=https://books.google.com/books?id=LDLhgzA930UC|date=28 October 2009|publisher=Omnibus Press|isbn=978-0-85712-001-4|page=49}}</ref>

In March 2004, the [[Institute of Contemporary Arts|ICA London]], showed most of her films from this period in their exhibition ''The Rare Films of Yoko Ono''.{{sfn|''The Rare Films of Yoko Ono''|2004}} She also acted in an obscure [[exploitation film]] in 1965, ''[[Satan's Bed (1965 film)|Satan's Bed]]''.<ref name=BioB/>