As to the effect of the wave on the air, we will suppose the water to be quite flat and the air motionless, a heavy undulation comes on the scene, it has to pass, so it pushes the air up with its face, letting it fall again as its back glides onwards. ↗
Blue is the male principle, stern and spiritual. Yellow the female principle, gentle, cheerful and sensual. Red is matter, brutal and heavy and always the colour which must be fought and vanquished by the other two. ↗
Well, Italy had been overrun by the War, there had practically been civil war, north and south of the Gothic Line, heavy bombing, the northern industrial cities had been bombed heavily and we had political disorder before 1948. ↗
The movie is actually from a book by Stephen King called The Body. When they were gonna put it to a motion picture, they found the story was a bit too strong for the title The Body, based on a young kid's movie. It would be too heavy. ↗