What is a paranormal thing/creature that scares you the most?

I was sitting with one of my male patients that was dying. It was about 2AM. His sister was sitting on one side and I was on the other. Suddenly the room got so cold that the sister checked to see if the heat had stopped working. As she sat down she said “ Oh my God!” I looked to where she was pointing and there was this black mass about 7 feet off the floor. It felt like pure evil was in the room. The black mass moved to the floor and then slid onto the bed. His sister was so scared she went running out of the room. I grabbed my patient’s hand and started praying for his soul. I had to jump back when it got half way up the cover. I watched as it went over him and then disappeared. The patient was dead without a sound at this time. I firmly believe that it was a Demon taking him to Hades. He had been an evil man and never accepted our Lord and Savior Jesus Christ at any time in his life. The other nurses came running in to see what was the matter because they said his sister wasn’t making any sense. She refused to go back in the room with them. I told them what had happened and the charge nurse said she had seen it once before and it sent her back to church because she didn’t want to see that as the last thing she would see.