Had to be done and I could have easily replied with perhaps 5 different things to make the same point, but I didn't.
It doesn't directly translate well in English, but back home, there is a perfect way to explain the results of continuing in a conversation while you feel that momentary spark of negative emotion (anger or disappointment or whatever it is). They say, what happens if you still reply with a mouth full of water? That's right, first, you can't say anything lucidly and second, you'll have a mess to clean up. So pause to drink that water, expunge that momentary spark and express yourself with class and clarity. Snark and sarcasm are all fun till it isn't and it's very easy to cross that line, just remember that for next time.