Execute the following in the console:

    $("#TB_window, #TB_overlay").remove()

or alternatively, if you are using Google Chrome, paste the following into the address bar:

   javascript: $("#TB_window, #TB_overlay").remove()

and hit enter.

P.S. if you copy-paste the latter bit of code into the address bar in Google Chrome, "javascript: " will be removed so you'll have to type that bit in manually.

At your service: http://www.readability.com/articles/1xnbyizw

(make sure to click the "readability view" at the top)

Refresh the page and stop the pop-up in its pants before it dares to come up again.

Okay, Refresh the page and immediately click on the STOP or "X" button as soon as the text has loaded and there will be no pop-up.