A small arena with a pillar in the center and a river of lava down the middle, leading into a lake. Sounds simple... except if you drop around the pillar, you'll lose your buddies. They won't turn up the next time you go around, either... or the next time. In fact, the room wraps around the pillar four times before reconnecting with itself. Wow-that must be some sort of a record. General mapmaking is quite good (except for an untextured wall in each of the 4 lava lakes-but you shouldn't be too distracted by the smearing, since you won't stay alive too long out there...).