First reports of a pregnant woman being removed from an L train and taken to the hospital yesterday morning—now news that a man had a heart attack on an A train at Columbus Circle last night! And he was saved—thanks to the efforts of cops, other passengers, and a heart defibrillator.

According to the Post, the 50-year-old Long Island man "fell ill on a Brooklyn-bound A train" (packed during the evening rush hour). Cops, plus a doctor and retired EMS worker, in the the station started to perform CPR, but since he didn't respond, they called for a defibrillator. The Post says, "Officer Joseph Dellauniversita, 23, who was appointed to the force in January 2008, used the device to shock the victim, but it did not work. However, a second attempt was successful." The man was taken to the hospital, where he is currently in stable condition.

Here's video of Dellauniversita explaining how the defibrillator works—he credited his Police Academy training, too.