He was staring aghast at the sudden appearance of Kemp, followed by the extraordinary sight of clothing tossing empty in the air. He saw Kemp felled, and struggling to his feet. He saw him rush forward, and go down again, felled like an ox. Then suddenly he was struck violently. By nothing! A vast weight, it seemed, leapt upon him, and he was hurled headlong down the staircase, with a grip on his throat and a knee in his groin.