I had a small Gordon Setter and she was very smart.
I don't know how many times I looked out the kitchen window and shes standing on the roof of an Olds Calais I had at the time, for a better view.
I found light scratches on the hood of my Rav 4 but it was too high for her.
She grew out of it though, but she put me through all kinds of stress. You know, the thought of her getting out and climbing up on someone else's car.