Another sleeper on the Northern Line

It is quite remarkable how many people pass their journey on the Northern Line fast asleep. I am fascinated by the internal body clock that certain individuals clearly possess that can allow them to sleep up until they have reached their station. Then they casually alight. This man was in no way phased or flustered and under my close scrutiny did not appear to spend even a moment wondering where he was. He slept for at least seven stations then casually woke, picked up his bags and got off.