Rappelz...Is it possible? : FPS / MMORPG / RTS Discussion

I was just thinking back to the old Everquest days, back in unrest (the area not server) after you are in the left yard, you could actually get "inside" the wall and kill mobs without taking damage. Also in EQ2, you could literally fall off the grid and do the same.
Now my highest level so far in Rappelz is 50, so Im still fairly new to it and its different areas. I was wondering if there was a place where you could "fall off the grid" and kill mobs without dmg, or get "inside" a wall. This was also possible with many other games, like for instance Rogue Spear.