A madness to click a selfie with a running train took the life of a polytechnic student and left another youngster seriously injured in West Bengal's Nadia district on Tuesday, railway sources and witnesses said.Rakesh Triguna, 23, and class nine student Suraj Mondal wanted to take the selfie about 1.5 kilometers from Kalyani station and upload it on social media.They positioned themselves on the edge of the railway track with the Krishnanagar local just behind them.But as they were clicking the selfie, the fast moving train rammed into them, said eye-witnesses.Triguna died on the spot, while Mondal was now fighting for his life in NRS Medical College and Hospital here, railway sources said.Triguna hailed from Bihar, and used to stay at Anandanagar near Kalyani.