One time I was in the men's room of the bar and there was a guy at the urinal. He was kind of drunk, and said to me in a mean-sounding voice, "I don't like your face. I think I'll push it in." I was scared green. I replied in an equally mean voice, "Get out of my way, or I'll pee right through ya!"

Part 4: "From Cornell to Caltech, With a Touch of Brazil", "Any Questions?", p. 177 - Surely You're Joking, Mr. Feynman! (1985)