I had a similar issue, except mine involved the tree. Outside of my bedroom window was a cancer-ridden tree that had a huge appendage which resembled a face. It just so happens that the night my family went to see Poltergeist, there was a thunder storm. Every time the lightning flashed that face profile appeared on my wall.
During the evening I sat with my arms wrapped around my legs and my chin resting on my knees while rocking back and forth. My bedroom was situated on the opposite side of the house from my parents. My sister’s room was right next to theirs. At one point I heard her scream and run into my parent’s bedroom. I stayed in my room wrestling with my fear, while grasping a baseball bat. I remember having a conversation with myself:
“If it’s supernatural, a bat is not going to help.”
“Shut up.”
“In fact, the term super-natural proves that anything you might try to use to defend yourself isn’t going to matter.”
“I said, ‘SHUT UP!’”
“I don’t know why you’re so worried. If anything is coming there’s not a damn thing you can do.”
“UGH! Would you shut up?”