It is necessary to conclude, from the material obtained in psychoanalysis, that these dreams repeat impressions from childhood—that is, that they refer to the movement games which have such extraordinary attractions for the child. What uncle has never made a child fly by running across the room with it with arms outstretched, or has never played falling with it by rocking it on his knee and then suddenly stretching out his leg, or by lifting it up high and then pretending to withdraw support. At this the children shout with joy, and demand more untiringly, especially if there is a little fright and dizziness attached to it; in after years they create a repetition of this in the dream, but in the dream they omit the hands which have held them, so that they now freely float and fall. The fondness of all small children for games like rocking and see-sawing is well known; and if they see gymnastic tricks at the circus their recollection of this rocking is refreshed. With some boys the hysterical attack consists simply in the reproduction of such tricks, which they accomplish with great skill. Not infrequently sexual sensations are excited by these movement games, harmless as they are in themselves.[CJ] To express the idea by a word which is current among us, and which covers all of these matters: It is the wild playing (“Hetzen”) of childhood which dreams about flying, falling, vertigo, and the like repeat, and the voluptuous feelings of which have now been turned into fear. But as every mother knows, the wild playing of children has often enough culminated in quarrelling and tears. I therefore have good reason for rejecting the explanation that the condition of our dermal sensations during sleep, the sensations caused by the movements of the lungs, and the like, give rise to dreams of flying and falling. I see that these very sensations have been reproduced from the memory with which the dream is concerned—that they are, therefore, a part of the dream content and not of the dream sources.