She's not your average trainer, though we bet she'd make one bad-ass boot camp instructor.

Jacqueline Carrizosa is a former Navy gunner's mate and search and rescue swimmer. She's the one who helped Rihanna look totally legit shooting the big guns in Battleship.

"She was the first famous person I ever met," says Jacqueline of her headline-magnet student. "I didn't know what to expect. [She made me realize] that everyone can be cool."

The pair became fast friends, bonding over music during downtime on the set. Jacqueline gave her protege high marks as a fast learner: "She asked a lot of questions to understand better. She was pretty much like a sponge."

What did Jacqueline think of the final product? "I was super stoked watching it!" she says.

Check out the practical joke Rihanna played on Taylor Kitsch on the set.
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