Whoa!! The good old Lovecraftian horror called "Dimensional Shambler"!
Amazing and cool monster from the Quake1 universe.
Though, if you want a really annoying monster, I would suggest the Spawns, those annoying, slimey, gooey and explosive annoyances ;-)
Link
ArcusMike99
whoooa! spooky!, cute but spooky! Awesome as usual Toxicoow! ^^