Was the man operating the vehicle when he fell asleep?
Was the car already in the water when he fell asleep?
Was there foul play involved, or can the incident be blamed solely on the deceased?
Was it raining?
Was there an avalanche?
Was there some kind of relevant natural disaster that happened?
Was it sea water that the man drowned in?
RANDOM THEORY TIME : The man was driving to the beach. He parked his car by the seashore to watch the sunset, then he fell asleep in his car. Then the tides rised so much it drowned the sleeping man inside.
Did the man inhale any gas that condensed while in his lungs to cause the drowning?
Did he drown in the car?
How soon after falling asleep did he drown: Under 5 minutes? 5 mins - 30 mins? 30 mins - 4 hours? etc... :V
Could this be ruled a murder?
Was the car flooded with the intent of drowning the man?
Was his sleep induced
or natural?
We assume the method of death was by drowning (something not supposed to be in his lungs causing him to not be able to breathe)?
Did he drown in a liquid?
Did he drown in a gas?
Did he drown in a fluid solid?
Was the position/location of his car relevant to his murder?
Was the car submerged in water?
Was he drowned in water?
Was anyone else in the car at the drowning?
Present near the car?
Was he involved in an automobile collision?
Was the cause of death directly related to an airbag?
Did the man suffer any physical injuries?
Is the solid fluid he drowned in, something that is commonly obtainable in powder form?
... was jell-o involved in this somehow? :|
Cement?
TEACHER TEACHER I NEED A CHEMIST ;_;
Was he hitchhiking in a cement truck?
The man fell into a pit in the road that was to be filled with cement. The man was unconscious for too long to call for help, and the workers never noticed him, somehow. They dumped the cement, killing the man.
What kind of car was he in - convertible, van, pickup truck, compact, SUV, 18-wheeler-style product transfer whatchamacallems, miniature car, go-kart, not relevant, other?
Was this part of an escape artist/magic trick of some sort?
Was the man sleeping inside one of those big trucks that mix cement?
Was the car on the road?
Was it near a road?
Was it down a hill or something?
Was the car itself filled with cement, or only a limited portion that caused the person to drown? Or is that an irrelevant concern?
Was the cement filling the car an accident?
Was the vehicle moving while he was asleep?
The man fell asleep during a traffic jam behind a cement mixer. The mixer broke and poured cement on his car, which was open-topped.