LogFAQs > #971894475

Disney, did better:
https://en.wikipedia.org/wiki/White_Wilderness_(film)

White Wilderness contains a scene that supposedly depicts a mass lemming migration, and ends with the lemmings leaping into the Arctic Ocean. The narrator of the film states that the lemmings are likely not committing suicide, but rather are in the course of migrating, and upon encountering a body of water are attempting to cross it. If the body of water the lemmings encounter is too wide, they can suffer exhaustion and drown as a result.

Bob McKeown, the host of the CBC program, discovered that the lemming scene was filmed at the Bow River near Canmore, and not in the Arctic Ocean as implied by the film. McKeown interviewed a lemming expert, who claimed that the particular species of lemming shown in the film is not known to migrate, much less commit mass suicide. In fact, the lemmings were transported to the location, jostled on turntables, and thrown off a cliff after which the footage was edited.