Language Barriers

I was walking down the hall at my hotel tonight and passed a middle-aged couple going the other way. I did the kind of under the breath, "Hello" as I walked by, and the man replied, "Good Morning" in a German sounding accent. I kind of wondered about that for a second as I continued down the hall. Then I heard the wife wonder about it too, "Good Morning?" He responded to the effect of, "Ya, Gut nacht, good night; Guten tag, Good morning..." (Pardon my German, Tim)