Sushant Singh Rajput's throwback videos have been doing the rounds on the Internet ever since he passed away. Actress Swastika Mukherjee, the late actor's co-star in "Detective Byomkesh Bakshy!", recently took to her Instagram account and shared an old video of him. In the video, Sushant dances along with Swastika on a song from Shah Rukh Khan's film "Raju Ban Gaya Gentleman".