You seen all those videos of snakes in and under cars? At least this was a cute kitten.
Could have been a massive spider... falling out inside the car.
Daughter-in-law had a large huntsman crawl across the windscreen (inside) while she was driving on narrow windy road in Blue Mountains. Took some nerve for her to complete the drive, find a safe spot to exit the car (screaming) while our son caught and disposed of the spider. told her while you can see it it's fine.
Oh.. spiders, snakes.. I've had all of them. But a kitty!
Thank goodness cats have nine lives!