Continuity: During the subway tunnel scenes, Rob's shirt seems to clean itself. At first it is dirty and sweat stained, then it is relatively clean, and then it is dirty again.
Incorrectly regarded as goofs: The time stamp on the camera disappears after Jason gives his testimonial to the camera. Considering Hud had no idea how to use the camera, and the option for time stamping is often a button on the side, it is very easy to conceive that the button was pressed at some point during the video. However, it is most likely a creative decision by the Director, as the time stamp would be annoying to view the entire time of the film.