5 A Brooklyn Man

Last October, a Brooklyn man said that his Apple Watch notified him of a life-threatening condition that might have gone unnoticed otherwise. The man, James Greene, wrote in a tweet on Oct. 13, 2017 that his wearable gave alerted him to a dangerous spike in his heart rate.

After receiving the alert, Greene went to his doctor, where he found out that he had a pulmonary embolism. It’s a deadly condition caused by blocked arteries in the lungs — but one that becomes much less risky when given prompt treatment. Greene later said in a tweet that he never imagined a “wrist computer” would end up saving his life.