The funniest was in ninth grade physical science. We had an experiment where we burned substances and identified them by the color of the flame. Both my lab partner and I were color blind. We did okay on most, but there was one substance that I could not see any color on - it was a “clear” flame. I’m serious - there was a thermal distortion, but I could barely tell the flame was there at all. I think we asked our neighbors on that one.