The next best, most unusual Oz costume may not be specifically Ozzy, but it's pretty close! Yes, you can show up at your Oz Halloween party dressed as a "haunted tree"! The warnings on this tree aren't quite exact, but they sure give you the right idea. Alternatively, if there is a standard, wooden tree somewhere in the vicinity of your party, maybe it wants a costume. The good news is, you can give it one! This sign is authentic and authorized, and looks just like the one in The Movie.