Characters
And I thought they smelled bad...on the outside!
— Han Solo • Star Wars: Episode V - The Empire Strikes Back

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
An earlier judgment about a bad smell is revised by the final reference to the outside. The delayed qualification implies that another encounter has made the first odor seem less impressive. The joke depends on that worsening comparison, without identifying what the speaker has opened or entered.
Context reviewed