My dad rushed him to the emergency vet once because he thought he had swallowed part of the tree. He would spin around in circles if you went outside without him. My parents lived in the flight path of a small airport and every time a plane would fly over he would run outside and go from one side of the yard to the other trying to chase the plane. This was accompanied by crazy jumping in the air and barking. I had a tie-down in my truck for the guide dogs and used it to keep the Eskie from jumping up at the window and scaring the life out of people walking by.
Once he jumped through the half open window of my mom’s car and title across a busy parking lot into a grocery store after me. Another time he tried to jump through my window to get to the drive through person handing me my order. And then there was the time he got out the front door (he was an expert door-dasher!) and when I got outside after him he was holding on to the bumper of the mail truck pulling with his crocodile grip and growling. The mail person had seen him before and stopped the truck but didn’t get out until we got there with the leash. He did not get better with age.