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10. She Had Her First Asthma Attack While Filming a Fake Sex Scene

Talk about embarrassing: This star found out she had asthma while filming a rigorous fake sex scene in 2010's Easy A. Stone explained: "I had a little asthma attack, without any prior knowledge that I had asthma, during the scene where we had to jump up and down for hours and hours screaming and yelling on the bed. [It] was humiliating, because it was the second day of shooting."