Trooper Steven Sosnowski responded to a call after a car slid into a ditch near Waterloo Wednesday.
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A mother and her two daughters were inside, so he helped situate the girls into a rescue vehicle.
To keep the oldest girl calm, Sosnowski started talking about the Disney movie "Frozen."
"Is that Elsa?" body cam video captured Sosnowski asking the girl.
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"I know Elsa, Princess Anna, Olaf," he continued.
"And Kristoff and Sven!" the girl responded. "He's a talking snowman."
The Nebraska State Patrol posted the body cam footage to Twitter, which was viewed more than 13,000 times.