Dream About Nun Severed Hand Horror Movie

Me and my cousin Megan were watching a horror movie called the Conjuring. Anyways so we were just watching it and then the phone screen turned off and the lights when out. We stayed there in silence for a second until the lights turned back on until the nun from the movie was there and we both screamed. Then the nun disappeared and the only thing that was left was a severed hand that layed on the ground. We ran out of the room, I don't even know where we were but somehow we knew our way around. We bumped into my uncle Chris, Megan's father and he asked us what happened and we told him everything, he walked in the room and nothing was left. He didn't believe us until the nun showed up again and then my dream ended.