It's rather funny, but I wonder if you've ever been a Game Master? One of the most common problems running a game, is making the puzzles simple enough. You have to use kindergarten or back of the cereal box level puzzles or the players will fail. I played with engineers, it's a game, and there is nothing riding on the outcome and we often failed stupid simple puzzles. Interviews have a lot riding on them and yes stress is terrible. Stress eats working memory for breakfast, NASA learned that the hard way.