Falls of the Hinterlands suckin' on my tendies

"Oh, I know, what you are talking about!" Apple exclaimed, once Rory described the kind of rainbow she had seen appear and vanish in the waterfall. She got to her feet and with her eyes focussed at the place, where the water was creating a mist, she walked in one direction for a little, then in the other, as if testing something. Finally she seemed to have found a good spot and sat down: "I see it right here. I think it depends on the light and the angle. Somewhere it's visible, somewhere it's not. Do not know the reason for it, though."