a striking realization

"In the nine o'clock twilight, as I approached the school building from across the street, there was a light on in the orthopedic appliances shop. I was startled to see a live person in the shopcase, a hefty girl of about thirty, in a green, yellow and lavender chiffon dress. She was changing the truss on the wooden dummy. As I came up to the show window, she had evidently just taken off the old truss; it was under her left arm (her right "profile" was toward me), and she was lacing up the new one on the dummy. I stood watching her, fascinated, till suddenly she sensed, then saw, that she was being watched. I quickly smiled--to show her that this was a no hostile figure in the tuxedo in the twilight on the other side of the glass--but it did no good. The girl's confusion was out of all normal proportion. She blushed, she dropped the removed truss, she stepped back on a stack of irrigation basins--and her feet went out from under her. I reached out to her instantly, hitting the tips of my fingers on the glass. She landed heavily on her bottom, like a skater. She immediately got to her feet without looking at me. Her face still flushed, she pushed her hair back with one hand, and resumed lacing up the truss on the dummy. It was just then that I had my Experience. Suddenly (and I say this, I believe, with all due self-consciousness), the sun came up and sped toward the bridge of my nose at the rate of ninety-three million miles a second. Blinded and very frightened--I had to put my hand on the glass to keep my balance. The thing lasted for no more than a few seconds. When I got my sight back, the girl had gone from the window, leaving behind her a shimmering field of exquisite, twice-blessed, enamel flowers."

De Daumier-Smith´s Blue Period - J.D. Salinger