First, the title of this thread made me laugh out loud!
Ours is an SPCA special, so we aren't entirely sure how old he is. It is painfully obvious that no one ever did anything with him in his past life.
He does the wriggle on his back and smile thing, and sleeps with all four in the air. I thought the running into things/ people was just him. Huh.
He barks incessantly...like he just gets stuck. I think he was left alone too long as a puppy and invented his own ACD OCD methods to pass the time.
He also menaces his own foot. ...Not sure what that's about. There's a couple screws loose with this one.