Corrected entry: When he's walking in the subway, Rob's shirt has a dark triangle of sweat (and dirt) on the back. In one clip the triangle is barely visible and the shirt looks a lot cleaner than before. In the next clip, the triangle is very clear again.
Jacob La Cour
8th Feb 2008
Correction: Rob takes his jacket off once they get in the subway station because he is hot and sweating a lot from running from the monster, thus the initial dark sweat spot on his back. They take a slow steady pace at first and since he is walking without his jacket, his sweat spot could have dried in between Hud's cuts. In the next cut they have obviously picked up the pace and the sweat spot appears darker from the long walk since after this cut they have a brief scuffle with the parasites and find themselves at 59th. South Brooklyn to 59th street near central park is not a short walk.