Puppies and kittens have a lot to learn, and sometimes it's a lot of fun watching them figure out their surroundings, like when they see themselves in the mirror and freak out. You could help out and intervene in some way, but why not pull out a camera instead and preserve that moment? Who wouldn't want to see Fido crashing straight into a mirror or see Buttons get into a fight with herself? Live entertainment is the best kind. Besides, it's only a matter of time before your pet pees on your shoes, so it's payback. In advance.