Prime Minister Manmohan Singh is not without a sense of humour. Often, when he is at home, he takes off his pagdi. Since he has very little hair, it is possible that he may not be easily recognised without his pagdi. So once when he was working from home, an official who entered his study carrying some files thought he had come to the wrong place and tried to quickly retrace his steps. "Come in, come in, I am the same Manmohan Singh you see every day" called out the prime minister to reassure him.