Dap of the Heavens

Dap of the Heavens
The Dap of the Heavens is a natural phenomenon that occurs in the Land of Ooo only every 20 years. In the episode "The Mountain", before Finn and Jake adventure into the Mountain of Matthew, they were camping out nearby getting ready to witness the phenomenon.

Description
The Dap of the Heavens involves two large star constellations in a humanoid shape. During this event, the star at the 'hand' of the two constellations light up bright enough to become 'fists' which 'knock' against each other, like a fist pump, before returning to their original positions and appearance.

It can be assumed that this phenomenon can only be viewed from a highland area near the Mountain of Matthew. It requires a telescope to be able to be seen.

While it is a very rare event, only happening every 20 years, Finn commented that it was slightly disappointing, despite the fact that at first he was quite excited to see it.