Passage: After returning home to Singapore, Priya and Honey are fired by their boss (Archana Puran Singh) for taking a non-permitted extension of 5-days in their vacation. In order to keep their jobs, Honey suggests her boss making a television program about Krishna. Aware of Krishna's love towards her, Priya calls him to join her in Singapore to ask her mother permission to marry her. Krishna's grandmother objects to this, saying that people will want to take advantage of his abilities. She then explains the events of the previous film, and also explains that his father Rohit was hired by Dr. Siddhant Arya (Naseeruddin Shah) to design a computer that could see the future in order to prevent wars and help prepare against natural disasters. However, Rohit later found out that the purpose of the computer was not for good purposes and he destroyed the machine. Rohit reportedly died in a laboratory accident that night, with Krishna's mother, Nisha dying of a broken heart shortly thereafter. Krishna promises his grandmother that he will never reveal his powers, so she permits him to go. In Singapore, during the program's production, Krishna keeps his word and reveals nothing exceptional about himself much to the disappointment of Honey and Priya, who get fired again.

Question: What will Krishna keep to himself in order for his grandmother to allow him to leave?
his powers