Attached Link: http://www.kuroyumes-developmentzone.com/appleyard/seapatrol/inpboat_sppb_and_4arms.jpg

One thing useful would be to "replace body part by prop" to replace the head by a flat surface where the neck has been cut.

I do not like mutilation effects. My experience with bodyless limbs is in cases of polymelia: see this link

"And there's a relief man for your base coming in it, a Sea Patrolman Peter Ellingsley. Qualified frogman. With him around you won't be - shorthanded.".