The ambulance crew gave the hospital staff at Corpus Christi Medical Center a fast rundown. Dennis Fegan, 48, had passed out at his home about 30 minutes earlier. Luckily, his parents were visiting, and they called for an ambulance after he fell from a dining chair to the floor. Then Fegan woke up, just as suddenly as he had collapsed. Three minutes later, he passed out again for less than a minute; then he came to. By the time the medics arrived, Fegan's parents had watched their son lose and regain consciousness at least eight times.