The interface device consists of the bearing that has 2 axis and the shaft that has 2 meter length.
The shaft must have 2 meter length for body-sense of participant.
This body-sense makes it possible to feel another reality of the Earth and the ground in this artwork.

This work uses a dual-axis tilt sensor, which finds the intersection point between the actual earth and the device.
The axis of the tilt sensor is set up to directly intersect with longitude/latitude lines.
It senses the dual-axis tilt vis-a`-vis the earth’s gravitational pull, which is computed by the computer and synchronized with the actual earth.
I custom created the algorithm that finds the intersection point with the earth.