you run to the elevator in one of big buildings and go to Floor 11, this floor is completely dark, but there seem no infected, and then you feel a bullet pass your head, look like it silencer as well, and you turn around you found someone with holding Rifle with Silencer, but strange.. how did she see you in the dark?

Hana : she speak in small voice you better not came to this floor.... She speak while still aim her rifle