The content still remains the same as under normal conditions, but the changes in the formal presentation give to the mind of the spectator unusual sensations which produce a new shading of the emotional background.
Of course, impressions which come to our eye can at first awaken only sensations, and a sensation is not an emotion.

But it is well known that in the view of modern physiological psychology our consciousness of the emotion itself is shaped and marked by the sensations which arise from our bodily organs.

As soon as such abnormal visual impressions stream into our consciousness, our whole background of fusing bodily sensations becomes altered and new emotions seem to take hold of us.

If we see on the screen a man hypnotized in the doctor's office, the patient himself may lie there with closed eyes, nothing in his features expressing his emotional setting and nothing radiating to us.

But if now only the doctor and the patient remain unchanged and steady, while everything in the whole room begins at first to tremble and then to wave and to change its form more and more rapidly so that a feeling of dizziness comes over us and an uncanny, ghastly unnaturalness overcomes the whole surrounding of the hypnotized person, we ourselves become seized by the strange emotion.