This happened when I was a university student in Manila, about four years ago. I'd gone to a weekend music festival on the outskirts of the city with two friends, and I'd brought what I thought was plenty of cash for food and the bus home.
The problem was that everything at the festival was far more expensive than I'd expected, and I lost track of how much I was spending. I bought a T-shirt, several rounds of drinks and some street food, and I didn't keep any money aside for the journey home. By eleven at night, when my friends and I separated because they were staying with a cousin nearby, I opened my wallet and found exactly forty pesos, which was not nearly enough for the bus. To make things worse, the cash machine at the venue had run out of money, and my phone was almost dead.
I felt a wave of panic. In the end, I walked to a nearby convenience store and explained my situation to the cashier, who let me charge my phone for fifteen minutes. I called my older sister, and although she lectured me for ten minutes, she transferred some money to a friend who lived nearby, and he met me with cash.
I felt embarrassed and quite foolish, especially as I'd always thought of myself as sensible. But it taught me a useful lesson. Now I always keep a small amount of emergency money hidden separately in my bag, and I set a budget before going out. My sister still teases me about the 'forty-peso night', which I suppose I deserve.