Death (witnessing or inflicting,) blood (seeing, touching & consuming,) internal organs (seeing, touching & removing; evisceration,) cannibalism (raw or cooked, alive or dead,) pain, fear, despair (witnessing or inflicting,) control/helplessness (witnessing or inflicting,) torture (emotional, mental, physical,) knives (stabbing, slicing, slitting,) saws (amputation,) needles (injection, piquerism, torture,) tears, screaming, losing control of bladder, throat slitting, decapitation, asphyxiation (drowning, hanging, manual strangulation,) self harm (cutting, suicide,) fingers (crushing with pliers, de-nailing,) extreme thin-ness or physical delicacy, extremely pale skin, female teens or children, innocence (the violation thereof,) non-con/consensual, victim cuming, bondange (rope, screws/nails through hands and feet,) necrophilia (fresh corpses only,) skull/eye/brain-fucking, electrocution, burning (flame, acid or heated metal,) tentacles (all the way though,) neck snaps, beating to death, stomach punching, stomach expansion, vore (swallowing whole, digestion/acid, snakes, monsters, bite-sized girls,) bestiality, fucked to death, crushing, impaling, dissection, vivisection, yuri/yaoi/straight, I'm sure I'm forgetting something.