The Obvious

An old man with a cane lives on the sixth floor of an apartment building.
There is no elevator in the building.
When he has to go out, he slides down the banisters to the bottom floor.
More challenging is getting back up to his sixth floor apartment when he arrives home.
As the old man sips his coffee, thinking about his dilemma, he flips through the newspaper.
He stops at the section headed “Apartments for Rent.”