as WorfoSaur noted, it is slightly slower, more electronic sounding (they do about half of the remix version). Then the house lights go up on the crowd and they launch into it at full speed (play the normal version) and the place goes bananas. Kind of a nice trick and I've seen it work to an amazing effect with the crowd. It is basically stretching the song from 2:30 minutes to 5 minutes.

The first time I saw them do it that way was at the Masonic Temple Theatre in Detroit. It was fantastic.