Anne (mrspunkysmom) has guessed correctly.

Afterword

by Joe Lindsey

The trail beckons crookedly. It drops away beneath you, picking a delicate path among rocks and roots, twisting around Trees and grade reversals, before disappearing gradually into the trees. Your front wheel rolls into the first section; the line appears unbidden before you and the bike floats over, rather than through, the rock garden. Your unblinking eyes scan farther down the trail, mentally picking up and storing each section and the means to get through it in your short-term subconscious. Your brain is active, taking in a thousand myriad interpretations and options to plot the right solution but is at the same time perfectly calm, unobstructed by extraneous thought; consciousness only momentarily surfaces amid the bliss of simply riding.

from The “The Noblest Invention”