Nuts

There's something in his apartment. A man looking for an insect-like thing devolves into a bout of insanity as his subconscious mind begins to strangle his waking one.

It is 300 years into the future. Earth's environment had been devastated by mankind's own foolish plans and humankind is beleaguered by the sentient forests which they have awoken. The world balance is tipped when a young boy named Agito stumbles across a machine that glowed in a strange blue hue inside a forbidden sanctuary.

A hand drawn animated short by Studio Ghibli.

Among the ruins of the city, there is a game only children can play. It is called “Otokoyo”; a game of hide-and-seek. But whenever children play this game, one by one they would disappear into the blinds of the buildings… The story begins when a boy enters the world of Otokoyo, to find his missing sister.

Donald is an admiral on a seagoing voyage with his nephews in which they encounter a ravenous shark.