What you'll need:
A stiff suit, brown
A starched shirt, brown
A well-worn tie, once again, brown
A sign that reads: "Judgment Day: May 21, 2011" (cross out May 21, write in Oct. 21)
A doomsday prophesy
Harold Camping is the 90-year-old biblical scholar who's wildly predicted the end of the world. Incorrectly. Twice. Assuming his Rapture yarns don't materialize as he predicts on Oct. 21, you'll be free to make a wild prediction of your own, in full costume. Don't worry if your math skills are lacking it's not like your prediction has to be correct. Just be sure to have a clever, roundabout reinterpretation when it doesn't come true. Then, make a brand-new prediction and watch people freak out all over again.