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Amy asks Penny to join her and the other guys on a trip to a science conference in Big Sur, California, as she believes them to be best friends. At first, she rejects the offer, and then accepts after learning about the free spa treatment. Before they leave, Sheldon ("travel supervisor") explains the timetable and seating arrangements. Amy convinced Sheldon to let Penny ride in the lead car with Sheldon and Leonard because her "Nebraska backwoods...

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