I was brushing my teeth and I heard one of my neighbors calling out to another one in a way that sounded almost panicked.
It got me thinking: if one of my neighbors were to come pounding on my door in a panic, begging me to open up, I might actually think about it. I might not open the door, because who knows what might be chasing the neighbor. Whatever it might be wold then know there's more than what it's chasing within.
It might divert additional energy to get in to kill us both.
Self-preservation or selfishness? Hard-heartedness?