It's always funny until someone calls the cops. Or at least that's what a pair of friends in Peoria found out when they decided to stage a fake robbery at a third friend's cafe.  Jade Katinas and Karen Harris burst into the Leaves 'N Beans Roasting Co. in Peoria Heights Tuesday to "rob" a friend who had no idea about the prank.  Peoria Heights Police Chief Dustin Sutton said he got a 911 call about an armed robbery and rushed four squad cars to the cafe.  The fake robbers, with plastic guns that had orange tipped barrels, were immediately met by real police with real guns.  Both Katinas and Harris were taken to jail.