At this moment there was a devastating explosion, or what seemed like an explosion, though it was not certain whether there was any noise. There was undoubtedly a blinding flash of light. Winston was not hurt, only prostrated. Although he had already been lying on his back when the thing happened, he had a curious feeling that he had been knocked into that position. A terrific, painless blow had flattened him out. Also something had happened inside his head. As his eyes regained their focus he remembered who he was, and where he was, and recognised the face that was gazing into his own; but somewhere or other there was a large patch of emptiness, as though a piece had been taken out of his brain.