On Friday, bears returned to D-Street as the domestic benchmark indices tumbled during the post-lunch session, ending far away from their respective intraday highs. Sensex declined by around 487.43 points or by 0.95 per cent to settle at 50,792.08 levels while Nifty dragged by 143.85 points or by 0.95 per cent to close at 15030.95 levels.