This image was taken by a hospital monitor, and allegedly shows a dark, contorted figure looming over a bed-ridden patient. The patient is said to have died within only a few hours. Possible case of pareidolia.
The Old Hag is a figure of folklore that appears throughout the world, often associated with sleep paralysis (read: Old Hag Syndrome). It’s said to be a witch who sits on the chests of her victims as they lie in bed.