#1 - Feb. 9, 2012, 11:34 a.m.
Occasionally, the groups of monsters (predominantly, skeletons) which spawn near the locked gates surrounding the outer perimeter of the Cemetery of the Forsaken will spawn on the opposite side of the gates. The gates act as a barrier and the monsters cannot be hit with attacks while on the other side of it.
This has happened to me twice. Once with a group of rare (blue text) skeletons - the last one of that group (the one that usually drops the goodies) was on the other side of the gate :(