to anyone who has been to the Tweeter center in boston, (for something like ozzfest) is there an open space in front of the main stage like there is for the second stage, or is it all seats? I went last year but i ahd bad seats and could tell. I want to know because if i go to the mayhem fest i dont want to have to be in a seat for Slipknot, (there would be no point in seeing them if you can only sit and watch)