The Door (1968)

Two Native Americans; one is hunting, another fishing. Together, they shake a tree and a bounty of fruit falls. They gorge on the bounty, growing huge. They are tempted by a lovely woman; she drops the key to a door, which, when opened, reveals a live-action black-and-yellow montage of modern life (airplanes, traffic jams, etc.). A dispute between the two leads to another montage, this time scenes of war.

The Door has a runtime of 6 minutes.