Big B tweeted himself as a 4th Idiot.

Amitabh Bachchan's new campaign is of Tata Sky #HarSceneKaMazaaLo . He tweeted himself today as a 4th Idiot while tagging Aamir Khan. This video is launched at the #HarSceneKaMazaaLo campaign of Tata Sky’s, which is offerings of 81 movie channels over all. They say that You can now indulge in your favourite movies on Tata Sky, just like our Filmy Critic Dada – Amitabh Bachchan!
Let's have a look at the video.