In a U-Bahn station. A German man asked me in German language.
[German man] : Where is the train going?
[Me] : Alt Mariendorf
[German man] : Oow! Thank you!
[Me] : [thinking... what's wrong? He asked in German and I could reply it. But then suddenly he said 'thank you' rather than 'danke'? My accent must be so weird to him...]