Some of things I've made in movies that I avoid making in my artwork:
(And maybe I need to stop avoiding them?)

mace
chain maille
Claymore
bow and arrow
quiver
armor
jewellery with computer screens in them
sarcophagi
spiky chains of doom
dagger
bommy knocker
robot
evil robot
computer insert for brain
giant fan
crockery
pendant of doom
orc faces
pitchforks
shotgun
alien gun
Rapier
Sabre
Morning star
Quarterstaff
War hammer
hatchet
axe
scythe
chess pieces
evil chess pieces
barrels
life-size sculpture of wizard
Broadsword
Katana
Club
Flail
Crossbow
slingshot
Trebuchet
castle
dungeon
giant tree complete with latex bark
stunt branch
etc etc...