Lucknow, Feb 26 (ANI): Railway officials had a tough time when a man likely to be mentally unstable climbed over the top of Doon Express. After half-an-hour struggle, the Government Railway Police (GRP) personnel succeeded in bringing the man down. Station Master RK Baghel informed that a high-tension wire running over the train created trouble in the rescue work. Eastern Railway's Doon Express runs between Howrah Junction and Dehradun.