Mine had some kind of accident that might have involved falling off one of my first floor wndow sills, or AN Other high perch, a few months after she came to live with me five years ago.
I found her under my bed, covered in blood (her jaw was fractured) and limping badly (sprained ankles). The vet said she'd been hit by a car but as My'd never been seen on the road before then or since, I think it's unlikely. The specialist who inspected her paw-damage later tactfully stopped short of contradicting my vet but did suggest her injuries were consistent with a fall. Or a badly-judged leap.
She recovered perfectly and thinks thanks to Pet Plan the three nights in hospital, surgery, drugs and expensive paw consultation hardly cost me anything. *wipes brow*
I met a Bengal kitten recently who had smashed her elbows in a similar accident, and was caged for months. My cat was lucky.