MUMBAI: On Sunday morning, the local train commuters from CST to Bhandup were in for a surprise when they saw none other than Amitabh Bachchan in their train. In no time, #BigBAurHeroKaSafar became a trending topic across social media with several people posting pictures and videos of the actor from the train. The hashtag #BigBAurHeroKaSafar was the number one trend nationwide, on Twitter. 

Big B was there to support a hero, Saurabh Nimbkar who featured on his show, 'Aaj Ki Raat Hai Zindagi'. He was impressed by Saurabh who sings in the train to raise funds for cancer patients, and wanted to join in for this noble cause. 

He not only cheered for Saurabh but sang along with him, leaving the crowds in a frenzy. The frenzy evidently wasn't just limited to the train compartment, but spread across social media with several people appreciating this gesture or expressing how surprised they were.  

'Aaj Ki Raat Hai Zindagi' which celebrates life and the small joys it offers, airs on Star Plus and hotstar, every Sunday at 8pm