Two people were trapped in their keyless car for half a day, thanks to their not being able to understand the door locking mechanism.
When they were freed by neighbours about 7.45am the next day, Mrs Smith was unconscious and her husband was struggling to breathe.
She said they were told by emergency services if they had spent another half hour in the car and they could have died.
Note that this was a design issue, and also perhaps a demographic one.
(thanks to Ton Zilstra)