Weirdness

Yesterday i stuck the Stone Roses "Second Coming" CD into my PC to give it a bit of a play. When CD's load on Winamp it scans the internet or something so it can recognise all the tracks...so it did that as usual, but it ended up giving me around 100 tracks, 85 of which were named like "Stone Roses - Unknown". The first 15 or so tracks were all the usual ones on the CD, but there was more weirdness. Around track 94, there was "Stone Roses - Fozz" which was a totally weird wall of feedback and cool sounds. It's definately is a hidden track, because it's not listed on the CD.

Has anyone else come across hidden tracks or weirdness with CD's?? I know of a few..there's a David Gray album where if you whizz backwards at the start of track 1 it goes into a hidden track before track 1 which is pretty cool. I also know you can get interesting and freaky results if you backplay the Stairway to Heaven vinyl....