Great question, and a nice feature to know about... not sure what I'd use it for mind.
At first thought it wasn't fair to ask a SQL 2012 question as its so new, but bit my lip and did a wee bit of research and the answer was there in a flash.
Relatively easy question come the end.
Cheers for the point. :-)
"The difficult tasks we do immediately, the impossible takes a little longer"