Many of them I met in head-on collision, but they made no impression on me. One huge irregular bulk of rock, the size of a house, thoroughly terrified me.

The illuminated mass swelled before my gaze, displayed for a fraction of a second a rough and lumpy surface, and then engulfed me. Or rather, I infer that it must have engulfed me; but so swift was my passage that I had no sooner seen it in the middle distance than I found myself already leaving it behind. (Flickr)