Did you know that Google Reader has a secret ninja mode? Activate it using the infamous Konami code (if you don't know what the Konami code is, shame on you!) and your favorite RSS reader will transform into this:

Not only has the cute ninja from GMail themes replaced your sidebar, your "Like" button has transformed into a heart! Click on the "Like" button for a nifty animation of flowering hearts:

Click on "Unlike," and the heart will break before your eyes:

View the YouTube video below for the full explanation and to see the animation in action:

Via GeekSugar.