Is it possible to faint from thinking youll run out of air?

I saw this article in the dailymail entitled 'couple close to death after night in locked car'
now cars have quite a few vents on the dashboard allowing for passive airflow so i hardly believe their car was some gas chamber so im wondering if they could have inadvertently killed themselves by believing they would suffocate in an enclosed space. one of them was unconscious the other said he had trouble breathing

it wouldve taken 10 hours to use up a car full of air,
the air change per hour in stationary cars windows up no fan on is 1-3 times per hour.
the air change per hour in a bedroom for instance is 1-2..so cars have more passive ventilation than rooms.