The song is told in John Connor's point-of-view. He lives 'outside the grid' (underground) in the movie and is trying to get away from the timeline he's supposed to prevent (the current, in the song's case), but no matter how hard he tries, it keeps dragging him back into it.
I think this:
The song is told in John Connor's point-of-view. He lives 'outside the grid' (underground) in the movie and is trying to get away from the timeline he's supposed to prevent (the current, in the song's case), but no matter how hard he tries, it keeps dragging him back into it.