Someone tried to traumatise me in the train last Saturday. But well, it was indeed an enlightening experience. I've learnt to think on my feet and give a deal of fake information so he doesn't have the means to carry on terrorising me after I alighted the train. Cheers to my new found ability.
On retrospect, perhaps I should have terrorised him by running off with his IC when he presented it to me. In any case, avoid travelling alone because there are quite a number of lunatics lingering around in society.