Not sure if this one was up there or not:
Walk in wearing all black, and a ski mask, and have a water gun in hand, filled with REALLY cold water, then walk up to the cashier. Say, "I'M A MURDERER, WANTED IN THE STATES OF TEXAS, ALABAMA, AND MINNESOTA. Now give me a Twix please."
My friend and I did that once. ^^
It was funny. Cashier just stared at us like we were nuts, and said, "A dollar fifty," and handed us each a Twix. XD