Susan Long sat on her porch with a cup of tea and watched the sun set behind the distant mountains. Her dog Debbie lay beside her quietly watching the desert that surrounded Susan's home. The dog was usually out chasing a rabbit or a lizard but lately she just lay on the porch surveying the wasteland beyond.
The next day, Susan had to be at work early so she watched a little TV and then hit the sack. Sometime, in the middle of the night, she was awakened by a tremendous crash as if someone was trying to break down her door.
Susan grabbed a shotgun that she kept on a rack and raced to the living room. Debbie was barking furiously while the door buckled from hammer blows. Susan aimed her shotgun and whatever came through was going to get a double dose of buckshot.
One final blow and the door gave way. Susan was expecting something massive, but the intruder was a small rat-like creature that stared at her with multiple black eyes. Susan pulled the trigger of her 12 gauge, and the heavy pellets disintegrated the horrible thing.
After the ordeal was over, Susan considered that the creature may have been an alien visitor with no intent to harm, but it wasn't her fault that the beast didn't know how to properly knock on a door.