This is the default Comment Box without LikeBox and the Wall Posts.
You can set to lock the screen until the user leaves a comment, auto open at the bottom of the page or shake animation for the Facebook icon.
Also possible the change the style to dark. (Much more options on admin)
You can check the shake animation on the Like Box Example Page.
Click on the Facebook icon on the right side or scroll down to open automatically!
WordPress version Admin area: