Well, I can't honestly say that I entirely understand this. The climax is when he pulls himself out of the hole of his own death, then wraps himself in the hole. All of the characters (J, N, and the giant hand) are the same person, and all of the events seem to be occurring within this person's mind. It's an abstract projection of themselves. It's a metaphor for loneliness. It's the tension of wanting the stability of identity versus the desperate need for connection and change.
Basically it's a one shot that involves a hand as a UFO in which it delivers essentials to a very lonely guy living in the middle of nowhere. Also he made a weird sausage ghost friend throughout this short.