[Striiker]

I remember when mobs would get hung up on geometry. In North Karana I watched a Lvl 2 Gnome kill a Hill Giant using his Life Tap spell alone (as it was unresistable) . The giant was running up against the wizard spire and he sat and cast on the opposite side of it. He wound up killing the giant.
Later, I briefly took advantage of this in Everfrost with the mammoths. They would get stuck on something all the time and I would nuke them into oblivion with my wizard.
I remember when this got fixed. They released a patch which would make the mob warp through if it was running in place for a couple of seconds.