Rachel is an Animorph from K. A. Applegate's Animorph series whose world was incorporated into the Imagination World.
She fought in the war against the Yeerks, but was killed in the final battle. She was later revived by He-Who-Must-Not-Be-Aggravated, and her revival was used to convince the Animorphs to join the Christian Morphers. As soon as she entered, she was tackled to the ground by a big, brown, feathery bullet. Her revival, along with the auxiliaries, and Jake and Ax's respective brothers, resulted in the Animorph's recruitment.
Primeval: New World
Alvin and the Chipmunks: The Squeakquel
She was part of the auxiliary swarm. She morphed an Ornitholestes. When Brittany fired Ian, she jumped up on top of the car and said <You fired!> Hawke screamed shrilly and dove back into the car, to which Rachel said <Dang it!> Later, she located Ian along with the rest of the swarm, and closed in.
Hundreds or thousands of other creatures.
It has been stated that Cassie, who did not take part in the swarm, told Rachel to "beat him up good". This explains why she was the first to jump up onto the vehicle. It was also stated that she was the first one to attack Hawke when the auxiliaries closed in.
When Rachel says <You fired!>, she is referencing A Bug's Life.