the head bopping up and down at a rapid speed, to me, appeared to have manipulated my visual sensory. as i stared at the central image of the moving head, i felt as if the image was still, such that i could make out the individual's closed eyes and lips. it began with an image of a skull-like figure and slowly, as the frame speed increased, the still image of the face became increasingly obvious. at the same time, i felt the central image enlarging, as if slowly engulfing the space and pushing the side images out of it.

did anyone else experience this?