I once nipped into a Tesco convenience sore while my friend filled up with petrol and came out , got in the car, turned to speak to the driver to face a bemused man who was waiting for his wife.
The best however was told, maybe on here , about a woman who came out of a supermarket with her bags, put them in the boot and then got into the passenger seat when she realised she had driven herself there.
As there were people out who had seen this she got out looking annoyed and said if he thinks I’m waiting any longer he can think again and get the bus home.
She then got into the driving seat and drove off.