I used to say back in the 90s that you shouldn't be afraid of the shadows in the daytime. You should, however, fear the shadows at night. As it turns out I was referring to those now commonly known as 'shadow people'.
I remember back then I was working security part time, mostly at construction sites. One time I was working at a site with two 4 storey housing complexes on it. I recall going for a foot patrol around the site, passing through the basement of one of the buildings. I could feel someone there, a presence, and I could swear that I saw a shadow figure as I went up the stairs back to ground level.
I quit that job a short time later.