We use the Chinese idiom "meng zai gu li" to metaphorically describe someone as confused, ignorant, and unaware of the truth, knowing nothing about relevant matters. Today, I actually saw a person 'meng zai gu li'. This was an advertisement for a HI-FI audio system. How fitting is that? Being placed inside a drum with a drum kit and a guitar to indicate being right in the middle of the action (a creative idea from the Swiss).