Corrected entry: We know that the little monsters are night vision seeing monsters. Now when they left the subway and walked to the makeshift hospital, it was extremely bright, blinding the characters, and the helicopter pad was also dangerously lit as well, so bright that it would attract attention to the big monster. But given the fact that the monsters see in night vision, it looks like a clue that the military found out a weakness with using bright lights. (Lighted areas are safe anyway, but to attract that attention at a helicopter pad would be dangerous unless it was keeping them away).
wizard_of_gore
26th Jan 2008
Correction: Anything that can be seen or deduced by simply watching the movie is not valid trivia.
wizard_of_gore ★