Story of a Descent
Part one:

Have you ever had this experience?
You are on a plane.
There are exits all around.
Say you are sitting in the window seat.
Row 18, right side.
Nothing happens, but the knowledge that there are exits all around you
    makes you want to test and make sure they are operational.
In other words, the knowledge that you are floating in space
    makes you want to float in space, but independent of the plane.

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