recursive object.observe sadness

observe.js

var foo = {};

function createObserve(obj) {
    Object.observe(obj, function(changeset) {
        changeset.forEach(function(change) {
            if (typeof change.object[change.name] === "object") {
                createObserve(change.object[change.name]);
            }
            console.log(change.name);
        });
    });
}

createObserve(foo);
foo.a = {};
foo.a.b = "you'll never see this";
setTimeout(function() {
    foo.a.c = "but you will see this";
}, 0);

http://vimeo.com/96425312

The video above should explain why :) if you still wondering why this is.