Quiet Dancing in Rain Easter Egg (Metal Gear Solid 5)

You will need to lift off from the mother base (don't go anywhere yet).

And wait for the message: "rain approaching your vicinity".

You have to make sure your bond with Quiet is over 80%.

After that, land in the mother base again (any platform).

Note: You should have used quiet in a previous mission.

You will trigger the easter egg cutscene.

Quiet dancing in the rain!