I saw something when I was a kid

Exposition

Currently I'm 18 years old, I was born on November 5th, 2003. To give you a little sense of why this happened, when I was younger, about six years years old till I was around 11 I stayed the weekend at my grandmother's. I called and I still call my grandmother Nina, now I tell my friends I'm half Mexican and if you know Spanish the word Nina means girl. I just grew up calling my grandma Nina. I'll tell you a bit about my Nina, so you know what kind of person I stayed with. My Nina is a sweet woman, currently she's been through one or two strokes, she's a breast cancer survivor, and now she's in a nursing home. She let me stay up late when I stayed with her, usually I'd be playing Roblox or Team Fortress 2. If I decided to sleep I'd either sleep on her couch or in her room. Now my Nina lived in a trailer park, the trailer she lived in is gone because of reasons. The neighbor, who we called Cowboy because of his appearance, had built a small treehouse for me and the other kids in the trailer park. Beside my Nina's trailer is a steep hill, the hill leads down to the other part of the park to the other trailers. I'd go down the hill with my scooter to see a friend or play in the basketball court that was there. This hill, to this day, scares the living shit out of me because of what appeared on it. This is a true story I swear on my life. Please believe me.