Bihar's Sushil Kumar, who won ₹5 crore on 'Kaun Banega Crorepati 5', said he experienced his life's worst phase after the win. "I was called at functions...almost 15 days...a month. This led to my education taking a back seat," he added. "I made investments in...businesses so I'd have something to tell journalists. However, most of those ventures flopped," said Sushil.