Taylor Swift's concert tour has dominated the box office in recent days and it's also the top-grossing concert film of all time here in the U.S. But a conversation on social media raised questions about movie etiquette and videos shared show film audiences singing, shining their phone flashlights and dancing in the aisles.

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Tesla sales jump after months of boycotts
Tesla reported a surprise increase in sales in the third quarter as the electric car maker likely benefited from a rush by consumers to take advantage of a $7,500 credit before it expired on Sept. 30. The company reported Thursday that sales in the three months through September rose 7% compared to the same period a year ago. The gain follows two quarters of steep declines as people turned off by CEO Elon Musk’s foray into right-wing politics avoided buying his company’s cars and even protested at some dealerships. Sales rose to 497,099 vehicles, compared with 462,890 in the same period last year.
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