Disney animal documentaries and urban legends
http://www.snopes.com/disney/films/lemmings.htm
Claim: During the filming of the 1958 Disney nature documentary White Wilderness, the film crew induced lemmings into jumping off a cliff and into the sea in order to document their supposedly suicidal behavior.
Status: True.
Origins: Lemming suicide is fiction. Contrary to popular belief, lemmings do not periodically hurl themselves off of cliffs and into the sea.....
More at the link above
