Talking of animal ULs, I was told this story about 15 years ago, by a guy I worked with. He said it had happened to his immediate neighbour and swore blind it was true. It seems too "good" to be true but I admit I've never heard a variation on it before or since.
It goes like this. My workmate's neighbour is driving home. It's a hot summer's day and he's travelling pretty fast when he hits a cat. He slams on the brakes but it's too late. Feeling shaken, he gets out. He looks around and sees the cat stretched out unmoving on the pavement (that's the bit you walk on in the UK

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He's about to drive off - after all, what can he do? - when he sees the cat move a little. Knowing that he hit it hard he knows it must be smashed up inside and decides to put it out of his misery. He takes a spade from his car boot and hits the cat once over the head, killing it instantly.
That evening, he gets a visit from the police. The officers tell him they have a report from a woman that he killed her cat. Apparently the woman saw the whole incident. She saw him drive down the street, stop for no reason, go to the boot of his car, remove a spade and smash her cat over the head with it. Then, she said, he gets in his car and drives off. Luckily she managed to record his number plate from where she was standing at her window.
When the guy hears this he laughs because it's obvious how this poor woman's misinterpreted what happened. He tells the officers the full story and they find it pretty funny too.
However, before they go, just for completeness, they want to check out his car. The guy says sure, why not? They do, and that's when they find the dead cat wedged in the wheel arch of the car.