Speaking of combat logs!

Maybe everyone already knows about this and I am just a dumb fuck, but go into the Raven Hill "Inn" and use an AoE spell or skill in the middle of the room to get attacked by a bunch of invisible monsters that can't be targeted (unless you are buffed with Detect Invisibility/Greater Invisibility). I originally heard about this from a topic on the official WoW forums, where some guy said there were "invisible level 50 monsters in duskwood" and I assumed he was just being a stupid dick until a bunch of other people came along and mentioned how they had similar experiences. I couldn't find any information about these things anywhere (probably because i didn't know the actual names) so I tested it out myself and it turned out to be true. Pretty cool!