Scary things at night

Last night Mom and I went out for a walk. Everything was fine until I sensed DANGER. We were walking down our street and I saw a fuzzy grey tall thing. When we moved , it would move too! I growled to let it know that I was there. It wasn't scared. I stopped and looked it. It stopped too! Mom and I kept walking and it got taller and taller so I started barking-someone has to protect our streets. Mom was laughing. She told me it was just her shadow on the hedges. I was mad at her shadow for tricking me so I growled some more.