I'm too generous to give a worst CGI moment, besides occasional issues (And the up close brachiosaur, but I love her to much).
Best CGI:
JP: Tim shutting the freezer door on the raptor. So tense, and quite convincing.
TLW: The male Tyrannosaur bursting out of the cargo hold, roaring to make himself known.
JP///: Spinosaurus breaking through the fencing.
JW: When Owen is hiding under the truck, and the Indominus is searching for him.
Critiques:
JP: In the famous shot of the freshly escaped Rex roaring proudly, looking at his feet quickly breaks the illusion.
TLW: Raptors looked pretty good, but when one raptor pounces on the black man it looked pretty goofy.
JP///: They got it perfect, not much else to say.
JW: Continuity of animal designs was non-existent.
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Formerly known as "Raptorlover0823."