I laughed about running over my neighbor's dog.
Is running over your neighbor's dog something that is funny to you?
I was just playing around with the dog. I don't know what you're talking about.
It is wrong to run over your neighbor's dog and laughing over it. It is wrong take pleasure in harming an animal. It is pure cruelty.
I was only joking, the dog wasn't hurt.
I'm relieved to learn learn that you were only joking, as it's horrible to take pleasure in harming an animal. Most people wouldn't find humor on that joke, as it's uncomfortable and upsetting to imagine. I would refrain from joking about such things in the future.