People in church

I was walking down the steps of a large brick church.  I turned to my friend and asked him if he saw somebody in the church as we were leaving.  I turned around and saw a shadowy figure out of the corner of my eye.  I went back in the church to investigate.  There were long corridors and stairway going up.  I started up the stairs and at the same time a group of people came down the corridor.  They were frantic and crying.  They all asked me if I saw the thing or not.  One lady was crying so hard we had to take her outside.  I went back in the church and shouted out for any body there.  All I heard was echos of my voice. I did not see or hear anybody.