Squirrels may have different personalities, as people do.
Tes, I do think that animals have dofferent personalities. I observed a lot of them, that is why I concluded this.
But with all that, your friend should have made it up to the poor squirrel by giving it some walnuts afterwards by way of apologizing for the joke.
I’m sure he did. But that squirrel was ANGRY.
You know how a squirrel sounds when it’s up in tree and spies a cat on the ground? Magnify that about a hundred times ;-)