Years ago, when I worked for a US District Court, I had a document that needed a judge's signature. So I went to this judge, and said, lightly, with a smile, "Judge, I need your auto-giraffe!" Never dropping a beat, he said, "Sorry, my giraffe's a windup model!"
Many years ago, in a semi-social situation, I was talking with a very bright woman, who mispronounced a word--I forget what. Being young and callow, overimpressed with my own erudition, and (as I see it now) bereft of social graces, I corrected her. Instantly sensing that it was a wrong thing to say, I tried to patch it up by saying, "Pardon me; I'm a hopeless pedant!" BOOM!--without a second's pause she replied, "No, that's pronounced PEAS-ant!" I think the fact that I almost fell on the floor laughing saved the day.