I was once the "please help me, I have no money to get home!" person.
My boyfriend of the time called me late-ish one evening. He was diabetic and had just had a fairly major blood sugar episode - where he drove, hallucinating, to the grocery store, and came to himself gobbling cookies in the parking lot. He told me not to come out to him, but, frantic, I raced across town, taking two buses to get to his place. I checked on him and we talked a bit, but then he rather firmly sent me home - he wasn't about to have me fussing unnecessarily over him. I took the first bus I needed to get home, but then, at the bus stop, the second bus never came. By now it was around midnight in a big city, and apparently the buses had stopped. I had hardly any money - just enough for a bus ride, in fact - and this was before cell phones. The area I was in was residential, with no cabs in sight. In tears, I started trying to walk home (a ridiculously long walk). At some point, I came across a middle-aged man sitting on his front porch having a smoke, and I poured out my whole sob story as only a melodramatic college student could. He called a cab for me and gave me $5 to pay for it. He wouldn't hear of me trying to pay him back. I went back to the area the next day but couldn't figure which house it was, so was never able to give him cookies or thank him otherwise. I hope he doesn't think I was a scammer - I was so grateful for his kindness.