Shah Rukh Khan is known for romantic songs and energetic numbers, but for Chennai Express, he’s stepping into unfamiliar territory. The actor will be seen in a street folk number in the film. A source says, “Shah Rukh will dance in a street folk dance form called Dappan koothu”. The song was shot last month with a group of dancers from the south. The two actors are working together for the first time. “The song is titled ‘1, 2, 3, 4… Dappan koothu hardcore…’. It has a lot of south Indian-style moves. Shah Rukh had lot of fun dancing and learning them. The dance is unique and nothing that one has seen SRK doing before. It is aesthetically shot and not a typical item number,” adds the source.