Groping in the dark

Ang Mo Kio, 7 km. This might well be my shortest, most intense ride. To make up for the long, intense work day (and night). It's dark. My glasses fog up. I don't know if the black patches are holes or shadows. The grass is wet, the tree roots are treacherous. I slip, pick myself up and ride on. Downhill on the path, my wheels slide and brakes squeal. Am I having fun yet?