The latest image challenge on the anarchic B3ta.com, Make Art More Awesome has come up with this little gem:

If you aren't laughing by now, you haven't got it, so I'll give you some help.

Belgian surrealist artist Réné Magritte is chiefly famed for his 1829 painting La trahison des images (The Treachery of Images):

Finally, you need to have seen Star Wars, and remember in particular this scene:

It maybe loses something in the explanation.