This is based on opinion. Please don't list it on a work's trope example list.
Nightmare Fuel / Sabrina the Teenage Witch
An early episode had Zelda and Hilda create a boy for Sabrina to date out of 'Man Dough.' At the end of the episode, he expires and explodes into globs of dough off-screen. After the other characters leave, his mouth reappears on a blob and excitedly says 'Man, what a great night!' (An ingredient mix-up made him overly enthusiastic).
One of the aunts off-handedly mentions an ex-boyfriend whom they gave a potion to make him a better listener. Cut to the guy in question waking up to discover his entire head is covered with ears, and screaming in absolute terror.
Zelda mentions last time she taught a class, she wound up storming out. She wonders what happened to them. Cut to the classroom, where all the students are still there, most of them deceased, apart from two elderly survivors who are only now beginning to wonder if the professor forgot about them.
The possibilities of what would happen to Sabrina if she was exposed as a witch are left (mostly) to the imagination.