
My brother gave me an "are -you-serious?" look and said, "it's FLAM-able, not FLAME-able". From that day on, I never forgot how to pronounce Flammable correctly and when someone mispronounces it, I do my best to correct them in the nicest way possible.
Check out other common mispronounced words and phrases at http://www.alphadictionary.com/articles/mispronounced_words.html .