I, being only 12 at the time, was home alone at my Atascadero house. It was February of 2012. I was sitting on my couch next to the front door doing homework after school while my dad was at work.
My pure white cat Casper was walking toward me, but a little more to her left, when she stopped dead in her tracks and looked up. The hairs on her back stood up, her tail got puffy, and she started hissing. I got up and looked around the wall divider at the front door, where she seemed to be looking, and saw nothing.
I looked back at Casper and she was still hissing and wide-eyed at the door. There was no one outside or at the door. Then, after seeing the slightest, lightest, fastest glimpse of the outline of a person, my cat started crying and whimpering, and her tail slipped between her legs and she ran off very fast.
The person I thought I saw was gone in half a nano-second. Explain that!