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.

A Romance of the Three Kingdoms retelling using SD Gundams. (Source: Myanimelist.net)

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.

An animated short film produced by Pixar included as a bonus on the DVD edition of the 2004 feature film "The Incredibles."

Kubo mesmerizes the people in his village with his magical gift for spinning wild tales with origami. When he accidentally summons an evil spirit seeking vengeance, Kubo is forced to go on a quest to solve the mystery of his fallen samurai father and his mystical weaponry, as well as discover his own magical powers.