All of you go to attend the mission you have been assigned to. You take the stairs and stop at the first floor. After a short while, Frank says, "I don't hear nothing. Think we should waste time on this floor or continue down?"

Just because Frank doesn't want to, you are seriously considering exploring this floor. If there are survivors, they probably wouldn't be making much noise in a building infested with man-eating monsters. But he is right, you should pick carefully what you do.