Amanda, OH, USA
This experience happened to me when I was about 8 years old.
Every year my family and I go up to Michigan to visit my aunt over the Fourth of July. I have been there every summer since I was a baby and I have never had any uncomfortable feelings in my aunt's home.
One afternoon, my family and I were talking in my aunt's finished basement. I fell asleep with everyone talking around me. I woke up and everyone had left me down in the basement, so I proceeded to go upstairs and look for them. I first went to the upstairs living room to find them. As I turned to walk out of the room, I glanced over to my aunt's couch. It was the weirdest thing, the couch had been pushed over a bit and looking out from behind the couch was a gremlin or at least that's the best description I have for it. It wasn't very tall, maybe a little less than a foot. It was brownish green and was sort of smirking at me. Needless to say, it scared the crap out of me and I ran outside to the pool and started to cry and tell my mom to come and look.
Of course, when we got back to the room, the couch was back in the normal spot and there was no gremlin. So, of course, no one believed me. I sort of felt that my eyes could be playing tricks on me, but then about 7 years later, I happened to be telling my cousin (not from my aunt who owned the house) about my story. He got really excited and said "You saw it in the green living room upstairs right?!" He proceeded to tell me that he was feeling a little faint and he laid down in that upstairs living room for a bit. He fell asleep and he woke up suddenly and saw a little greenish black thing run across the room.
My aunt doesn't own any pets. Yay for me not being crazy!
Thank you for your time.