An hour on the same bench
The puzzle
A man sits on the same bench every day.
He does nothing.
After an hour he goes home.
See the answer (spoiler)
Spoilers from here on. If you want to work it out yourself, leave this folded and move on.
Answer
He used to meet his wife on that bench every weekend.
She died.
Sitting there for an hour is how he keeps the appointment.