Meh, I find it more interesting when my cat Ernie stalks squirrels. He can't get at them, of course, and I think he knows better than to try to pounce and end up ramming his snoot into the glass door, but it is really cute...he just goes all flat, his ears drop down so they're sticking out sideways like airplane wings, and he stays perfectly still except for the very tip of his tail. Cats are highly amusing.