There were a lot of disturbing situations in Friday the 13th: The Series, despite its overall cheesiness. One of the freakiest involved a body-transferring amulet. A Corrupt Hick with a penchant for stuffing animals (and people) is shoved down the stairs by a chair containing the decayed stuffed corpse of his grandfather and is on the verge of death; rather than dying, he transfers his mind into the corpse. Normally, this would restore the corpse to a living, intact condition, but perhaps being rotten and stuffed with sawdust was too much to overcome. When the madman reappears, he hisses eerily, "Why die?", as if even life as a decaying monster is better than death to him. (Unfortunately, captioning revealed that he actually says "Time to die," which is too trite to be really scary any more.)
His abdomen got slashed at one point, and when he runs out of the house his foot gets caught in a trap set in a nearby tree, at which point he's hoisted up by his ankle and the corpse's rotted insides and sawdust start spilling out due to the wind as he screams in agony.
The episode with "Mesmer's Bauble" is quite disturbing. A homely guy uses it to make himself popular and handsome so that he can become the love of a singer he had a crush on. But then he decides loving her is not enough...he has to be her. Cue a scene where he is literally melting into her body. And if that wasn't bad enough, when the bauble is removed all the wishes are canceled causing him to revert from a beautiful woman to a homely man in an equally disturbing way.
We never found out what the scarecrow did with the heads it collected.
That doll in the pilot is evil with a capital E-V-I-L, and the girl who ends up with her is just as bad. (Is the doll influencing her? Was she already somewhat bad to begin with? Or is it a little bit of both?)
No list of this series' Nightmare Fuel can be complete without mentioning "My Wife As A Dog". It's bad enough that the cursed collar starts turning the man's "disobedient" wife into a dog. The ending makes it worse because the bad guy WON. While the collar is eventually recovered and taken back to the shop, the original wife is still very much a golden retriever.