Set up shop on the side of a busy street and offer to read tea leaves for people. When someone stops, look into the cup and tell the dude that that the tea says, “IT is going to happen. The Thing you’ve been dreading is approaching. It is nearly upon you. The only way to evade it is to pay this wise sage $50.” See how many people fall for it.
(Disclaimer – give their money back. I do not endorse stealing from people. I do, however, endorse laughing at people’s stupidity. So feel free to laugh obnoxiously in their face as you hand their money back.)