What is the most worrying scene you have ever seen?

Very early, at night, I once passed an overpass hole in Shenzhen. Under the outer wall of the pier, a man of about 40 years old was squatting, holding half a bag of bread in his hand, with worn-out luggage on the side, eating bread in his mouth and sprinkling dry powder. Under the dim street lamp, the night seems a bit bleak. I don't know what he went through, but the scene was really heartbreaking: when he looked up, I saw tears in his eyes.