This is a parody on one of the attacks The World has. It's seen in the manga and in the video game. Don't know what it's called, though. EDIT: After poking around a bit, I found a video with this image in it, if anyone's curious. http://www.youtube.com/watch?v=YvtH9DKwzUY&feature=related It's at about 0:08
I haven't watched 'Madoka' yet, but seeing as this girl is always paired with Dio/The World, I'm guessing she has some basic time control?