Permanent link to this comic: http://xkcd.com/501/
Image URL (for hotlinking/embedding): http://imgs.xkcd.com/comics/faust_20.png
Satan: Mortal! I come offering a deal -
Guy: Read the sign.
Satan: "By entering this room, you agree to forfeit your own soul rather than negotiate with the mortal within..." Wait, you can't -
Guy: Too late.
Caption: Mephistopheles encounters the E.U.L.A.