I was doing well while taking and engineering exam until I reached a question about tensile strength about a bridge. The multiple choice answers did not match my answer and I wrote on the answer sheet that I could not calculate because the span of the bridge was not included.
After the test, I told the professor that I did not see the span in the description of the question and I needed that to get the right answer.
He responded, "Noooooo one expects the span is in the question!" #comedy source