I have several stories from one of my old work places. I was working on a machine that strapped bundles of news papers that came off the press. I had any empty bottle of water sitting on top of the machine about 7 feet up. Im sure the vibrations made the bottle fall and it fell straight down like an arrow and it landed straight up on the cap, it never bounced or anything. Another time I was working in the area and a bunch of papers fell off a conveyer belt. I squatted down to pick them up and I knew my a$$ crack was hanging out and I felt 3 tugs on my shirt. I jumped up real quick and spun around and nobody was there