A diving trip turned into a nightmare when a man watched helplessly as his friend was attacked and killed by a massive shark ...

The man was diving in San Diego when a massive great white shark attacked and killed him as his friend in the water watched in horror ...

Robert Pamperin, 33, dove into the beautiful waters of La Jolla Cove in San Diego with his friend Gerald Lehrer one evening ...

Two friends were free-diving when a massive shark attacked, dragged one of them to his death as his friend watched helplessly ...