Red Wurms in Halls of Testing/EToV ignore Collision
 

The Burning/Flaming Guardians completely ignore walls - if you pull one it will come straight through whatever walls are in it's way, and once you start fighting it it is trivial to push them through any walls your fighting near and have them drop under world.

We also noticed this, I thought it was coincidence it was fire wurms, thought it was everything in there that could get pushed under the world.

We managed to do it with a White wurm also after awhile so maybe. Never happened on a Drake/Wyvern/racnar though.