Amid a heated debate in the Rajya Sabha against crucial farm bills, which cleared the parliament this afternoon, Trinamool Congress MP Derek O'Brien tried to tear the rule book and snatch off Deputy Chairman Harivansh Narayan's microphone. Derek O'Brien rushed to the well of the house to register his protest against the centre. "This is brutal murder of the parliamentary democratic system," the Trinamool Congress MP said responding to the high drama, which led to a 10-minute adjournment of the house.