Inciting Event: Sid discovers the dinosaur eggs.
First Plot Point: The mother dinosaur comes for her babies and kidnaps Sid.
First Pinch Point: The dinosaurs threaten Manny and the rest of the herd, and Buck saves them.
Midpoint: Sid and the dinosaur come to an understanding.
Second Pinch Point: Buck tells the herd about the huge killer dinosaur Rudy.
Third Plot Point: Ellie goes into labor.
Climax: Rudy attacks.
Climactic Moment: The mother dinosaur saves Sid and the herd from Rudy.
Resolution: The herd returns home, while Buck elects to stay in the dinosaur world.