A car can be a deadly place to be in an automobile accident. And then, you can die while simply sitting in a parked car, its engine running, the windows up and the air-con running. The freak accident that recently involved three Chennai-based young software engineers in a Santro is an illustration of how death can strike viciously and silently while doing nothing less innocuous than sitting in a car. Now, though knowledge of the circumstances in the incident is still forthcoming, a post mortem report of the three people points a probable finger at the cause of death — a heavy amount of carbon monoxide in the lungs.