Acceptable Lifestyle Targets: Never mind that Screweyes' circus is visually spectacular. The people who would go to see it are repeatedly branded as freaks, jerks, and "weirdos", and Cecilia even says outright that there's something wrong with them.
Rex's sudden musical number in the middle of the parade that somehow everyone knows the words to, is a particularly heavy one. Even the other dinosaurs are stunned.
Professor Screweyes's death by crows. A deleted scene gives more explanation for why he keeps them around and why they turn on him, but it's out of nowhere in the movie.
Creepy Awesome: Screweyes keeps crows around and commands them in order to master his fear of them. Whoa, bravery test worthy of Batman.
Crowning Moment of Funny: One that stands out; Louie annoys the heck out of Elsa and she understandably doesn't like him initially. There comes a point where he needs her help and (once again) mistakes her for a bat. After she corrects him...
Faux Symbolism: Professor Screweyes forms himself into a cruciform before his crows consume him.
Idiot Plot: Seriously, think about it. A scientist from the future goes back in time and collects dinosaurs, force evolves their brains so they're just smart enough to be able to speak and reason on a fourth grade level (except poor Dweeb, who's basically left functionally disabled), brings them to modern day New York and then just drops them off in the city with very vague instructions of finding a fellow scientist without any training or understanding of how modern life functions. The entire city mistakes them for balloons, until one girl points out they're not, just because they happen to be marching with the Thanksgiving Day parade, never mind the fact that they are dancing and singing. Then a good chunk of the plot revolves around the dinos stumbling into trouble, being chased by the authorities and then trying to rescue two kids who stupidly signed a contract with an obviously creepy old man. The time traveler comes back to save everything, but after all the madness has happened, not before. If anybody in the movie put more than three seconds of thought into their actions, it would be a pretty short story.
The entire conflict with Screweyes is kicked off by Louie walking into the circus after hours, asking to join, being turned away, ignoring Cecilia's suggestions that they leave, and pestering Screweyes until he relents.
Narm: "Let no bad happen!" and Louie's speech about guys who ruin the way the world should be.
As soon as you realize Cecilia is being voiced by Lisa Simpson, it is impossible to take any of her lines seriously anymore.
The conclusion of Louie and Cecilia's romance storyline goes from cute to utterly creepy as Cecilia basically demands a kiss from Louie. Nobody ever needs to hear Lisa Simpson trying to be flirtatious. Ever.
Narm Charm: Louie's aforementioned speech, for pairing utter earnestness with words like "stiffs" and "yahoos."
Paranoia Fuel: As stated above, this movie will probably leave you suspicious of crows for a while.
Romantic Plot Tumor: The whole romance thing with Louie and Cecilia. Which doesn't really go anywhere.
Elsa's crush on Rex. Unlike Louie and Cecilia, this one's way more ambiguous, given Rex's reactions to Elsa's flirting show he doesn't feel very comfortable about the whole thing, even when she flat out reveals her feelings right after the climax. Thankfully, it's got just two scenes and that is all.
This Is Your Premise on Drugs: Let us see… A benevolent mad scientist uses time travel to go back in time and make a quartet of dinosaurs sentient and launches them in New York City with the task of rescuing a kid from an Evil Ringleader who knows black magic.