Trick films include transformations, superimpositions, disappearances, rear projections, and the frequent appearance of ghosts and apparent decapitations.
While the vampire's simplified internal organ structure makes it difficult to harm it with attacks to the body, decapitation will result in the vampire's death.
Thus, decapitation by means of sawing, or dismemberment by means of sawing are merely tangential sub-themes, though some ambiguous cases might be included.