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With tweets like: "If you roll, we will weed you out" and "be a hero without heroin", the new, pun-filled Twitter feed of the police commissioner in the Indian city of Mumbai, shows a police force determined to put the pun into punishment. It's not subtle, but is it effective? And is it funny? Comedian Papa CJ tells us why it might help fight crime. (Photo: Mumbai police. Credit: Getty Images)