Shortly after I adopted my golden Bonnie (8mo old), she was in the pass seat and I had the window in the truck halfway. She had her head out but that wasn't enough so she put her paws on the sill inside the window, better! Then she put her paws on the sill outside the window, that was ever better! The I look and she has her rear paws on the sill on the inside of the window, her front paws on the sill outside the window, and her belly teetering on the top edge of the glass!!! I couldn't pull over soon enough so I grabbed her tail and as gently as I could I pulled her back into the seat. No more open windows for a year!