She rips open the door then her machete up and ready to attack as she places herself in front of the door.  Only after making sure it's clear, or scaring the piss out of whoever might be lurking outside will she move into the hall.  She doesn't even bother answering Allison.  Maybe she'd have to explain that it's not paranoia that drives her but a sixth sense.  Of course, if they're met with something that's not human its very likely she'll be turning to shut the door again.