It used to be on an advert years ago, with a woman walking along a road having just walked out, and her boyfriend driving after her, looking for her, in the rain, and he finds her etc etc. I think it was a car ad actually.
It had this slow walking bassline,
Dum....dadum....dadum....dadum...going down the scale,
and the words went something like,
'Thinking of happiness.....
why did you leave....
Thinking of loneliness...etc etc etc.
Been driving me nuts for years.