On all the under Dal. Video's everybody runs past the proof of demise force field, going this same route; Probably thinking it would be pretty slick to get behind it for the Tuesday reset when players are crowded around Archmage Lan'Dalock.
So I created a quick (less than a min) video showing the process.
I figured this out after noticing that your flying mount activates as soon as you walk onto the water outside of the normal confines of the room.
It's like the torch jump in SW, it takes a couple of practise runs to get the positioning just right, but once you nail it you can get it every time.
NEED: Mammoth, Waterwalking, Flying Mount.
Bonus: Noggenfogger Shrink (maintains the element of surprise, since half of your mount sticking through the wall on the way there is a little bit telling.
Fun: Laying various feasts, portable mailboxes, repair bots, camp fires and anything else that persists behind the forcefield can be fun. Focus lenses work through the forcefield and can draw the attention of players who are too busy to notice you.
EDIT: The YT tags don't seem to work but the video shows when I post a reg. link, Am I doing something wrong?
[ame="http://www.youtube.com/watch?v=lDjfe0D8Bxg"]http://www.youtube.com/watch?v=lDjfe0D8Bxg[/ame]