I suggest watching Jackson Galaxy's videos about cats on youtube, they are really great and every cat owner should watch them.
What does a cat knows about strangulation, hehe, was probably doing it completely accidentally. But more interestingly have your pets ever tried to kill themselves? I've heard of dogs that go out and jump in front of car.
My dog would ignore cars 99% of time but she also had days when she just suddenly decided to play the hero and attack the car while barking as if it was a dragon. I like how dog can have different days, but of course I wish she was more careful.
And the same thing on yard. If she was on yard without leash while someone drove home, she'd walk towards the car, but sometimes she would stay far away and just watch and wait. And some days she would listen to you when you told her to stay and not run under a car and some days her ears were for decoration.
Truly, she was the cutest little doggo! I wish I could have shown her to all of you on this forum. I just wish she had been mine alone so I could have trained her better. It's really hard to train a dog when everyone else in the family does everything wrong. Like if you train her not to bark but then the others just encourage her to bark. Or if you teach her not to beg for food while you are eating and then everyone else just feeds her cake straight from the table.
It's funny how in animals their "imperfections" make them better and funnier while in humans it's often just frustrating.