Merlin.

There are many urban legends that are generally believed to be fact, the one that comes to mind just now is that man is the only animal that sleeps on its back. However, we have owned several dogs that do this, it seems to a sign that the dog feels safe and confident.

Merlin is such a dog, but on this occasion, only one end of him is on his back, this end is on his side. The bit sticking up behind his head is one of his back legs.