Megastar Amitabh Bachchan, who will be seen in a "never-seen-before" avatar in upcoming TV show “Aaj Ki Raat Hai Zindagi”, was so excited about the project that he decided to choreograph the trailer himself.The newly launched trailer of the show has Amitabh standing in an elevator and breaking into an impromptu jig.The 72-year-old, who is returning on Star Plus after over 15 years, is personally looking into every aspect of the show -- be it creative, music and content.“Big B has donned the hat of a choreographer for the show's trailer. He decided to design the entire clap on his own. He along with a dance troupe created the clap/dance move. This has now become the signature step for the show and will be seen across all promos,” a source said.A premiere date is yet to be announced for the show.