Breaking 911 claims New York subway worker David Martinez is being hailed as a hero for saving his co-worker’s life. Monica Braithwaite collapsed and was lying across a third rail when he came to her aid. Monica was having a heart attack. David remembered reading an article on how to perform CPR by using the beat of the song ”Stayin Alive”. It’s rhythm of 100 to 120 beats per minute is ideal for chest compressions. David began chest compressions while singing the song to himself. He saved Monica’s life.