This is based on opinion. Please don't list it on a work's trope example list.
Nightmare Fuel / A Nightmare on Elm Street 4: The Dream Master
Debbie's death involves her turning into a cockroach in what is clearly a very painful transformation before being crushed in a roach motel. Also, take note that out of the entire movie, Debbie's death was the longest and the most elaborate that Freddy inflicted.
Freddy's pizza. It has the tiny screaming head of his victims, begging for release, as "toppings". Freddy casually impales one with a finger claw and pops it in his mouth, as it's still screaming for help.