I SEE WHAT YOU DID THERE.
Referring to: Know Your Meme | Internet Slang. 121 Photos.
This phrase can be used many ways on the Internets.
In the patronizing sense of the phrase, an image of the character Fry from Futurama is often used to more clearly portray the lack of sincerity. Fry’s character is known for being less than clever.
This phrase can also be employed to accuse, mock, or give props.
I see what you did there.
http://www.buzzfeed.com/dell/the-best-of-the-i-see-what-you-did-there-meme