Bhaskar Fools Tathacharya

Bhaskar secretly visits Amrapali in her room to wish her luck for her game the next day. Meanwhile, Tathacharcya senses someone is in Amrapali's room and he decides to check the same. Even as Bhaskar successfully slips out of Amrapali's room, he plays a prank on Tathacharya. What is this prank? How will Tathacharya react?