Hahaha my dog Ivan does the same thing. No teeth baring but more or less just the same. He'll look anywhere but at you or what you're showing him and then he'll go to the kennel and everything. Hilarious.
That's as funny as the cat flushing the toilet. Someone wondered why in the hell their water bill was so high so they put a camera in the bathroom one morning and headed off to work. Turns out their cat was going into the bathroom after they left and constantly flushing the toilet to watch the water swirl around for an hour or so at a time. It's pretty funny.
My wife's mutt does the same thing, but without the grimace (He's not mine. I said no and we still ended up with him.) I'm not so soft-spoken, though. I'm sure the neighbors know when he's been naughty. Filthy mutt (my dog, not the one in the vid). I'm stealing the bit about the kennel though. I really dislike my wife's dog but other people's dogs are great.