There’s something about Christopher Walken. That something has made the amazingly versatile actor-dancer-singer-comedian a unique presence and a pop culture phenomenon. He has become a favorite subject for impersonators drawn to this supremely talented individual who is also, in his way, strange-looking (that hair! those eyes!) and strange-sounding (those unusual cadences). Also unique is that his impersonators respond out of affection rather than an urge to ridicule.