I've been reading Craig Mod's account of walking the old Tōkaidō Road and the photo here is one he shared
It brought mind the time that I fell asleep while riding my bike.
I was returning home from a party in Canberra around 4am among frost and probably too drunk.
Between the Governor General's residence and Scrivener Dam is a tunnel that leads under Lady Denman Drive.
It would've been in that tunnel that I had a micro-sleep, as I awoke to the vibrations from straying off the bike path and found myself passing through the trees among the grassy slope that drops toward the Molonglo River.
Anyway, it wasn't something that I'd recommend!
I am, however, impressed with the fellow in Craig's photo and his ability to nap safely on a bicycle.