Oregon - Dog owner LeDarius Tremayne Smith has shown off the rather wild way his four-legged friend behaves when it's finally time for bed.

At first, it seemed LeDarius had recorded a completely normal everyday situation with his dog Pistachio.

In the clip, the four-legged friend can be seen wagging his tail in front of his owner as if he is asking him for something very specific.

His owner already seems to know the game and runs after his dog, who starts moving excitedly and heads into another room.

Dogs Hilarity ensues after woman gets a second dog: "you just end up getting judged twice as much"

There, without hesitation, Pistachio disappears into the cage where he always spends the night.

But in that second, the sleepy dog completely transforms!

Instead of snuggling up in his blanket, Pistachio suddenly bares his teeth, growls, barks, and lets his eyes bulge outwards in fear. As if bitten by a spider, he even tries to push open the door of the cage that his owner had just closed!

"He kept begging me to put him to bed and then he turns into a gremlin," his owner explained.

It's not clear from the video why the dog reacted so aggressively. Perhaps it was his strange way of saying "goodnight"?

In any case, the dog with two personalities went viral on TikTok, with the transformation already being viewed more than seven million times.

While some are familiar with the strange behavior of their own dogs, others want to know the reason for it.

One suspected that Pistachio might be guarding his bed, and according to Newsweek, studies have suggested that guarding objects can make pups a bit aggressive.