Fridge Horror: After the space monkeys got napalmed, they all integrated into one giant cell that wasted no time beginning to divide, meaning that the napalm caused the evolutionary process to start all over, but on a MUCH bigger scale. If the single post-napalm alien cell was as big as it was, imagine what the end result would've been. Can you say "space monkeys the size of Russia"?
For double the horror, imagine if Woodman had actually gotten his way and been allowed to pop off a nuke.
For what it's worth, it's not practical for a single animal to be that big since it would be impossible to maintain its metabolism, and the creatures would probably have rapidly evolved to be smaller - but not before wiping out the larger part of America. And since they'd already waded through the evolutionary ladder once, they'd probably be much tougher too.
Narm: The last few chapters of the book crank up the nihilism while throwing in some bizarre predictions of future evolution, leading to unintentional hilarity. To wit: robots eat Mars, giant invisible salamanders roam the Earth, and the descendants of humanity get wiped out by trees with mind-control powers.
Squick: Apart from the constant, vivid descriptions of excrement and erections, we also have the rape of a 12-year-old Neanderthal girl.
For the Professional Wrestling stable
Badass Decay: Against The Shield as a whole. Evolution themselves have never been able to handle them in straight brawls, constantly outmaneuvered by them, and tends to rely on having several people help them or jump The Shield first before doing anything. And even that sometimes doesn't work. Throughout the entire storyline, despite what their new creed is, they've failed to actually live up to it until Hunter launched Plan B and had Seth Rollins turn against his brothers.