* The effects of the Klingon [[strike:disruptor]] ''rip-you-apart-from-the-inside-out-while-you-scream-in-agony'' beam are... pretty horrific.
* The Genesis planet tearing itself apart.
-->'''Kruge:''' Yes, exhilarating, isn't it?
* The sheer suddenness of David's death.
* The scene where [[spoiler:child!Spock turns into teen!Spock. Bones cracking, skin stretching, and screaming. Lots of screaming.]] And then, FridgeHorror sets in when you realize that[[spoiler:you heard that screaming before they came upon child!Spock.]]
* The most graphic depiction of disruptor disintegration Franchise/StarTrek has ever shown. The victim grabs his head in agony as he falls back against his control console and is consumed by energy ''from the inside, out''.