Unmarked spoilers below!
- The beginning sequence begins with the mutilated corpses of almost an entire crew in a satellite and a woman desperately trying to escape. Said corpses caused by a mutated rat about as large as an ape, and purely interested in wanton murder. Thankfully, she manages to escape the monster...only for the damages it caused to her escape pod to rend open on reentry and the woman is atomized.
- While spectacular, the attack of the monster trio on Chicago is also terrifying in many ways. Ralph seems often more concerned on snacking on people, at one point even retreating briefly to chew on a man. When Humvees are thrown in the air like plastic toys, at least twice you can also see their drivers flying away and then to the ground, screaming. Things look hopeless enough already, then a third monster much bigger than the other two joins them to make the situation even more desperate - to the point the military think the only option left is to use such firepower there will be no Chicago left afterwards. Overall, the destruction can feel much less funny when it looks more realistic as it does here.
- Ralph hunting down the soldiers in the forest, which feels like something out of a more straightforward horror movie.
- Lizzie, once the attractant signal is silenced, seems motivated by genuine hatred rather than hunger. Even after she kills Ralph and proves nigh-invulnerable to attack, she'd rather chase down a lone human who'd annoyed her than go back and finish devouring the giant carcass.
- Ralph's death. He is brutally thrown about and chewed on by Lizzie, while the camera give a close-up look or Ralph's terrified, agonized expression. Then she does the infamous crocodile death roll, and twists his head clean off his neck and swallows it in one gulp! Even for a giant flying wolf, it's a horrifically violent end.
- Lizzie makes her entrance into the Chicago fight by going up the river and then completely capsizing a ferry, and we get a good shot of its unfortunate passengers screaming as they're flung off the boat or drowned when the ship capsizes.
- Really, the violence in the movie is something to behold as it is R rated style violence within the PG-13 ratings.
