GM zone? Quick question

[Turp]

Hey was just wondering if anyone knew anything about this, back in the day when Kunark first came out on live i was iksar shm and on my way to Kurns Tower, i went to zone in but it didnt zone me it let me go behind the zone walls at kurns and there was this Red/Black ball of Fire i clicked it and it zoned me into something like Chome or so (cannot remember exact name) but i fell for 100k dmg an died an a GM had to get my corpse back for me but i was never told anything about where i ended up or what it was so i assume it is a GM zone?, can anyone comment on this, Thanks