Recently Koena Mitra pulled off successful prank on her colleagues with very little effort and tricked them into believing that she is getting engaged. Koena sent SMS writing: "I know this may shock and surprise you but you are invited for my engagement on Feb 29 at J.W. Marriott Hotel. Invites will reach you soon, please message me your address." Most of her friends failed to notice anything unusual about the date 'Feb 29' and the actress received more than 45 SMSs in response to her invite. Her friends' lack of attention added up to a satisfying and an unusual experience for the actress.