SHIV Sena chief Bal Thackeray is unpredictable and his reactions are often volcanic. But when he chose to erupt and attack Chief Minister Manohar Joshi in his much publicised interviews to Saamna, the Sena mouthpiece, it caught partymen unawares. The timing was what was most intriguing. Thackeray's broadside against Joshi on two consecutive days came on the eve of the state budget, just when the Congress was gearing up to take on the Joshi government.