On the “U2: Popmart: Live From Mexico City” concert DVD the band has also included a hidden feature for their fans to uncover.
Insert the second disc of the set and on the Main Menu select the “Enter” entry.
Once you’re in the Popmart store in the Documentary aisle, press the “Up” button on your remote control and then press “Enter.” This will select the security camera at the top of the screen. You will now see a bizarre video of a bizarre song. It has nothing to do with U2, but there it is!