Second paragraph of third chapter:

The forest’s red floor was spongy from the long fall of pine needles, a slow accumulation through the years, but it was the steady soft pounding of Frank’s feet that the floor now supported. The tips of sunken stones and the ridges of slow-searching tree roots disrupted the clean line of the path, but Frank’s running shoes trod firmly upon them, finding their angles, their roughnesses, a momentary grip and release as he pushed on up the slope.

Glorious set of stories about the revolution in society caused by the invention of a teleporter. Strong thumbs up. Recommended. You can get it here.