Shadow People

Shadow people (also known as Shadow men, shadow folk or shadow beings) are said to be shadow like creatures of supernatural origin that appear as dark forms in the peripheries of people's vision and disintegrate, or move between walls, when noticed.
Reports of shadow people are similar to ghost sightings, but differ in that shadow people are not reported as having human features, wearing modern/period clothing, or attempting to communicate. Witnesses also do not report the same feelings of being in the presence of something that 'was once human'. Some individuals have described being menaced, chased, or (more rarely) attacked by shadow people. There have also been reports of shadow people appearing in front of witnesses or lingering for several seconds before disappearing. Witnesses report that encounters are typically accompanied by a feeling of dread.