Just wondering and when will the next one be. What's the highest altitude arena possible? I would be very interested in seeing athletes perform like this - I mean they would all have the same disadvantage. Will be interesting to see how they fight under these circumstances - it's gotta effect prep work right? Am I remembering it wrong or did GSP climb a really high mountain and did exercises up there to prep up for normal gravity making him lighter and faster when he came down to fight??