Well, being run over killed our cat, but by all accounts he seemed wound up and confused immediately before hand. I didn't see that myself, but a local woman tried to pick him up, and he reacted strangely, so she came to fetch me, but he had been run over before we found him again.
He had been sitting on the shed roof right by our neighbours fence and they were smoking heavily.
Could this have contributed? I often wonder about the effect of second hand cannabis smoke drifting in through our doors and windows, but have been assured by a drug expert that it won't be measurable in DC, but what about cats? And he ws "in the firing line" longer than any human in the family would be?