Christ, those players in the center must be laggy as all Hell, unless they're in a separate level and just moving about through NPCs.
EDIT:
Just went into the spar arena. Must say I'm pretty impressed with how the interface works out and how smooth the whole affair worked out. Good job, guys
It would be better if it was a bit more linear for players. Make it a single hallway leading to the arena, or maybe two arenas, and make it a nopk zone in the entrance hallways, because it's kind of annoying to see people fighting outside.
Still waiting on tailor commands, though!