Guy in chicago in a very unclean shirt claimed he was from out of town and that his train tickets got stolen. He started begging my frend adn I for money. I told him no but my friend gave him a few dollars. He ended up saying something along the lines of "well see what happens when you're in this situation".

Another time when I was visiting Montreal for my friends 18th birthday, some guy came and asked me for money to check into a homeless shelter. I told him no and he said ok thanks anyway and ran away.