A couple who decided to do it in the car, not on it. Cause of death: Carbon monoxide poisoning When it happened: Feb 2006 Where it happened: Milwaukee Sex on the hood of the car is the real deal. Sex inside a car? It's overrated, and as evidenced here, sometimes deadly. A Milwaukee couple was found dead in a 1978 Cutlass, which was parked inside a closed garage. They were apparently going for a ride inside of the car before the two died from carbon monoxide poisoning.