Cardoard cutouts painted black with the eyes cut out and a glow stick in a little box glued (or duct taped) to the back of the head.if you don't want to do full sized cutouts, you could just do creepy figures in windows.
Shape by Quentin Arnaud - Great examples of rim lighting. Bump up the ambient just a tad so the face isn't completely lost? play with reflectors to get a half lit nose/lips and some catch in the eyes? try with eyes closed as well.
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