Another sign I've been in Germany too long

I was talking to my German colleague (GC) who now lives in the UK.

GC: Hold on, I need to grab my Coke.
H: Skip the Coke, too much sugar. (Knowing GC is trying to be more healthy.)
GC: It's ok, it's diet.
H: That's even worse. Chemicals. Aspartame.
GC: It's the new Diet Coke with Vitamins. And you're sounding like a German.
H: (ahem) The chemicals, they're obviously going to your brain already.