Ghostly Cemetery Figure

by Combatgonny
(Stavanger, Norway)

Me and my girlfriend were practicing night shots in a cemetery when my girlfriend discovered on one of the photos a figure behind a tree. The exposure was about 20 seconds. Can anyone explain this?
The picture is cut-out.

If someone wants the original please contact me at combatgonny(at)hotmail.com

(Really great picture! That figure appears to be looking at the camera and is quite creepy in appearance. Thanks so much for sending it in! ~Siobhan)