Being a cube?

A young child of mine underwent anesthesia and disassociated. Said they were a green cube and on top of the cube was a spiral that increased outward in width the further it got away from the cube. The spiral began very tight from the top of the cube and expanded outward.

Long story short, I'm happy for the kid.

Does anyone have any insight to contribute.

Said the setting was like the matrix. Black and green.

Also mentioned what appears to be astral projection as his consciousness grew closer to his body.