It seemed half an hour.

Twice I leaped aside to avoid blows aimed at me, and each time ran blindly in a fresh direction; but all at once the idea occurred to me in a flash that in my unnerved stupefied position I must have been going backward and struck my head violently against a tree, for it seemed as if there was a violent shock like thunder with a flash of lightning to dazzle my eyes, and then there was nothing at all..