Given a sentence, generate a most likely context or previous statement. The previous statement should be relevant to the given statement.

Trailing behind, someone watches someone drive on, keeping a still distance away from someone.
Hiking a tunnel, they sweep flashlights over their surroundings.

Someone lowers a smile and leans forward.
Someone enters the cabin and notices his colleague in her formfitting suit.

Another man is playing a harmonica.
A man is seen talking as he unbuttons his shirt.