* There's something terrifying about small creatures that can eat 20 times their weight, move very fast, jump high, are extremely strong for their size, and are highly aggressive. Also the fate of the Captain in the fourth movie where a baby Critter jumps in his mouth and bites at the back of his throat.
* In the climax of the second film, all the critters became one giant ball of gnawing teeth. They roll on one of the fleeing townsfolk, and all that's left is [[StrippedToTheBone a twitching skeleton with only bits of muscle]].
** All the more horrible if you notice that [[spoiler: the skull is still intact. ''The brain is still alive in that skeleton'', at least for several more seconds.]]
* [[spoiler:Steve's]] death in the first movie, a great example of NothingIsScarier; all the gore plays out in the viewer's imagination, rather than on screen.