Part of this promotional campaign involved USB drives that were left in concert venues for fans to find during Nine Inch Nails' 2007 European tour. During a concert in Lisbon, Portugal, a USB flash drive was found in a bathroom stall containing a high-quality MP3 of the track "My Violent Heart", a song from the then-unreleased album. Another USB drive was found at a concert in Barcelona, Spain, containing the track "Me, I'm Not". Messages found on the drives and tour clothing led to additional websites and images from the game, and the early release of several unheard songs from the album. Following the discovery of the USB drives, the high-quality audio files quickly circulated the internet. Owners of websites hosting the files soon received cease and desist orders from the Recording Industry Association of America, despite Interscope having sanctioned the viral campaign and the early release of the tracks. Reznor told "The Guardian":