TrinityCore/TrinityCore — pull request #5798 by Jayz33 (2012-03-19 19:14:51+00:00)
Title: New teleport-up system for all arenas, in case of falling under the map

Since there are still issues with the MovementGenerators, it happens frequently that players fall through the map. Mainly in arenas it's an annoying thing.
The current way to port the player back up is by checking if their z coord is below -500.
I've made a slightly more refined system to port the player back up as fast as possible, depending on the arena.
I've tested it and it worked perfectly for all arenas (including the Ring of Valor & Dalaran Sewers).