What will happen if the world turn upside down?

As Stratton did, the subjects of the study all adjusted their actions to the upside down world. They did not, however, see the world as right side up. Mostly, they reported feeling as though they had been turned upside down in the regular world. Essentially, even though they knew it wasn't true, they felt like they were walking on the ceiling or the sky. But there was never any actual inversion.