I'm currently vacationing with my son and my SO near Berchtesgaden in Germany. All the mountains got us talking about echos, and this in turn made me consider what people yell to "test the echo"?
In Denmark we yell: "HVAD DRIKKER MØLLER?"
This translates to "What does Møller drink?"
And the echo replies: "ØLLER..ØLler..Øller…øller"
Øller translates to "beers".
What do you people yell?