Do you know the Indonesian word "tumben"? It's a very useful and beautiful word that is used to express surprise or curiosity about someone's unusual or unexpected behavior. It's typically used when someone does something out of character or something they don't usually do. Depending on the context, it can be translated to English as "That's unusual," "That's rare," "That's surprising," or "You're not usually like this." For example: 1. Tumben kamu bangun pagi. (It's surprising to see you up early OR You're up early today, that's unusual) 2. Tumben banget kamu nggak bawa mobil. (It's unusual that you didn't bring your car OR You're not driving today? That's surprising) 3. Tumben hujan di bulan ini. (It's rare for it to rain this month OR It's surprising to have rain this month)