But no matter what form they take when the spirit world and the human world collide, the end result is completely terrifying.
If you’re a believer in the paranormal then you won’t need to be convinced that things really do go bump in the night, but just in case here are 25 of the most convincing paranormal encounters ever captured on camera.
This eerie photograph was taken 1985, during a meeting of the Masons in the 14th-century venue, which had once also been used as a prison. There were over a 100 Mason’s in attendance that night who all say there was no one in robes at the event.
This creepy holiday snap of an unsuspecting tourist at the Grand Canyon was taken sometime in the 80s.
At first cafe owner Dan Clifford thought he had a night time intruder when he reviewed the video from his security camera.