Actor Arjun Rampal, who is busy shooting for Prakash Jha's "Satyagraha" in Bhopal with Amitabh Bachchan and the rest of the team, is in awe of the megastar.

"First scene of the film with the legend Amitabh Bachchan done, ufff he's just so amazing. In top form, sense of humour on fire," Arjun tweeted.

The film also features Ajay Devgn, Kareena Kapoor and Manoj Bajpayee.