Mine disappeared from the thread. Damn, Paranormal Activity on The Escapist. Anyway:
When one of my friends says something illogical, I tend to respond with: "Right ... let me know how that works out for you" in English and in a sarcastic manner.
I once used one when I ate too much and didn't feel too good. I had two big orders of chips years ago and my friend had only one. I had obviously ordered too much so after finishing the first one, I dropped on my chair and literally said: "I'm dying out here." I said it in English because that gave it a comical effect. My friend, who was just sipping of his Coke, burst out in laughter which resulted in all the coke dripping out of his mouth on his chips, thereby ruining his order. I haven't used the line in years, but the story spread like wildfire and the line has gained quite some notoriety among my friends.