from from www.ghost-sighting.co.uk/
Vortex: A long streak across a photo that may be caused by a very high-speeding “orb;” some believe vortices are a gateway between both realms (physical and spirit realms). They are usually white in color and may appear as a funnel-shape. Camera straps, human hair, a tree branch, etc., right in front of the camera lens during exposure have been notoriously mistaken for a vortex. It is important to make sure anything that may interfere with your photo is removed from within the front of the camera.