Are your gastrointestinal problems getting worse?

Students M and T speak German. Student C does not.

C: (to Student M) Hey there! How do you say "Hi, have a nice day" in German?
M: Sind deine Verdaungsprobleme schlimmer geworden? (for the rest of us: zint die-nuh fehr-doungs-prohb-leh-meh shlim-mer geh-vohr-den?)
C: Sind deine Verdaungsprobleme schlimmer geworden?
M: Yup, you've got it!

Later that day:
C: (to Student T) Sind deine Verdaungsprobleme schlimmer geworden?
T: My stomach is fine thank you! (Storms off angrily)
C: What!? All I said was "Hi! Have a nice day!"

Myself, I must say that I am quite impressed with Student M. I mean, would you have been able to think of "Are your gastrointestinal problems getting worse?" on the spot like that?