He also happened to offer Shweta Menon (his ex wife) a role but she refused him. It was her refusal that got him upset and that's how his problem reoccurred. It seems he had a meeting at the J.W Marriot with Shweta but as she did not turn up it got Bobby really upset and aggressive and that's when he had to rush to the hospital. It seems whenever he gets upset he starts talking loudly to himself. He is supposed to be bipolar and hence when he gets upset he becomes very aggressive.
As known from a friend of Bobby, its not the first time when Bobby's bipolar disorder has come to surface. It seems during his divorce with Shweta Menon he suffered from many relapses. Bobby has written scripts for Balaji shows like Kasamh Se and has done roles for them too. After being in the hospital he made his comeback with Kasamh Se. On trying to contact him Bobby's cell happened to be switched off.