I never over react, not my style. Just because I "argue" my points articulately and with passion (at times) only reflect my Latin blood! Not vitriol. 9 times out of 10 I am not mad - and when I say something as - the aforementioned nonsense comment - 10 out of 10 I am messing with the person. That person being you this time.
That said, yes I know what you meant by it and I mostly don't agree. However, like aforementioned again, I couldn't be bothered to argue my point because it isn't worth getting into a serious debate about. Thusly, why I said something nonsensical to make a jest and brush it off.
Next time I say something that nonsensical respond back with "your face is full retard" or something akin to that and hopefully we can both get a simple laugh out of it.