Lemmings do not periodically hurl themselves off cliffs and into the sea. Cyclical explosions in population do occasionally induce lemmings to attempt to migrate to areas of lesser population density, and when such migrations occur, some lemmings do die by falling over cliffs or drowning in lakes or rivers. These deaths are neither acts of "suicide" nor the result of compulsive unreasoning behavior, however; they're accidental deaths resulting from lemmings' venturing into unfamiliar Villages and being crowded and pushed over dangerous ledges or venturing into the water in a quest to reach a new executive golf course.