A Walken the park Christopher Walken is spending the weekend with his nephew, Jesse Grey Walken. Jesse has a few movie credits to his name, and of course his uncle does too, so they're having the great conversation of two professionals, all while enjoying a pleasant stroll through the neighborhood. They cross a street, when a police car appears from nowhere, lights flashing and sirens blaring. An old, bald officer steps out of the vehicle, and walks stone-faced toward the two men. ""What's the p…