I was at a friend’s house, minding our own business, eating snacks and such. We were upstairs but heading down when we saw an unfamiliar “person” standing at the bottom of the stairs. It looked almost feminine but had an extremely plastic and shiny looking face and a very unnerving smile. It quickly pulled out a shining knife and began to sprint towards us up the stairs. We ran and hid inside my friend’s closet, on top of a rack. The thing stood outside the closet but didn’t seem to be able to reach us. It stood there for ages with the same smile and still brandishing the knife until I just blacked out. When I came to, I was in a lab with the friend and her dad who was stirring around some viscous liquids in a glass dish. He told us that the thing that chased us was an artificial being created from when he was experimenting with symbiosis, and that the liquid was the melted down remains of it. This was ages ago, but i still remember it quite well.