interesting incident - wrong train!

This happened not very long ago. My neighbor was transfered to Kharagpur. Their household stuff was to be transported by a truck. The truck was loaded and my neighbor's son accompanied by my son travelled in the truck to help unload the things in Kharagpur.

After the unloading was done, these boys came to the station to get back to Jamshedpur. The two got into the train waiting at the station and were busy chatting. The train started moving, and after few minutes the two realised that  the train was moving towards Calcutta and not Jamshedpur! Nobody could help them because the train would stop next only at Calcutta. The boys had no option but to travel in that direction. They alighted at Calcutta and waited for the Jamshedpur train. This time, they carefully boarded the train after checking and safely returned to Jamshedpur. The crowning part of it was - they both travelled with  the Kharagpur to Jamshedpur ticket all through but via Calcutta!