congratulations, your dog sounds like my old 2-stoke outboard

the dog is nervous

Looking at his tail as well as his obvious laugh, it looks like he's just excited to be the in the freaking car, like every other dog there is. Dogs express their excitement by both their panting and their vocation. Some are more expressive than others.

It is more likely that Legacy is right and that the dog is just terrified than it is that the dog is expressing any sort of human-ish response.

Give the poor thing water!

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*length=00:39

The duration of this video has been updated from unknown to 39 secs - length declared by cricket.