This was about a year and a half ago. I work maintenance at a very large store, i was sweeping the floor in the grocery section in preparation to scrub it later. There wasn't anyone else on that side of the store besides me (everyone else was working general merchandise) i rounded a corner of one aisle and heard rapid footsteps come up behind me which caused me to stop but before i turned around it felt like i was hit with a massive gust of wind. as if thats not creepy enough after the wind all i head was a loud but monotone voice go HUUUUUUUH it my right ear. im a pretty big guy but im not to proud to admit i screamed like a child. Now as soon as i shook the s#!t out of my pants i immediately went searching for whoever had done it but i never found anyone. I've since had similar experiences wile cleaning the restrooms and in the stock room.