Thank you for explaining this better.
I have a hard time grasping the concept, but you explained it well.
I am an EXTREMELY jumpy person. Like, if someone at work starts talking to me and I didn't see or hear them coming towards me, I seriously almost jump 10 ft in the air. This can be someone very casually asking me something. I thought I was going to have a heart attack years ago really late night/early morning when my son was a baby, and I didn't see his mother go into his room. She walked out of the room as I was going to get him, said "I got it" in a fairly regular voice and I seriously thought I was having a heart attack.
So for me, personally, if I was expecting to be alone in a church at 4am, and anyone made a noise to get my attention, I would probably soil myself and freeze up.
This is a little off the beaten path, but there is speculation that in the past, some serial killers played recordings of babies crying in order to get (particularly women) to answer the door and investigate the sound.