The Backrooms (My version)

One day, me and my friends were filming a movie. After taking a good scene, they told me to back up a bit. All of a sudden, I fell through the ground. I found myself in a huge room with a yellow wallpaper, moist carpet, and fluorescent buzzing lights. I yelled for help, but not a single soul answered. I whispered to myself, "What is this?" I was walking down a hallway when I looked behind, and I noticed a black thing moving. I thought nothing of it and continued walking. As I was walking, I found a gap which I looked into. Inside was an infinite hallway.
Eventually, I walked into a room with a ladder leading to a huge gap on the wall. I decided to climb up the ladder into the gap which led to a room with a green glow like something was glow-in-the-dark. I decided to get out of that green-lit room. I yelled, "Can anybody hear me?" with no response heard. I whispered, "Damn it." Then, I found arrows thinking it was the exit. Instead, I find something very strange. It was a drawing that said, "DON'T MOVE, STAY STILL."
All of a sudden, I heard a screeching noise with a monster coming after me. I ran for my life. As I was running, I found a column room and I caught a brief glimpse of the monster chasing me. Then, I found a gap on the floor. As the creature was about to get me, I jumped in. I fell into what looked like an unfinished basement with a staircase and no furniture whatsoever. I went up the staircase and turned the light switch off. The staircase led to an art gallery of some sort. 
I saw a courtyard-looking room in the distance. When I approached the window, I also saw a lot of windows with a huge field in the middle. As I was exploring the place, I saw a big chasm. When I looked beneath, I saw that the corridors were endless. I mumbled to myself, "This isn't real." I found a door which said "Fire Exit: Keep Clear." I open the door hoping I would return to Earth. I went up the staircase and opened the last door, but it led me back to the large, ugly yellow room. I was feeling like yelling, "GOD DAMN IT!" But I didn't want the creature to catch me again, so I kept quiet.
As I was walking through the yellow room, something threw a chair. I knew that was the monster from earlier. I ran to a gap inside the wall. I actually caught a good glimpse of the creature. But it followed me in. I slip through a passage and inside was what looked like a steep slide. All of a sudden, I heard a deep "HOO" noise. The creature then pushed me towards the slide. I was falling from the sky, landing into someone's backyard.
== Some footage I took ==
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Category:Creepypasta
Category:Footage discovered
Category:Frontyardigans Creepypastas