Pretty soon, we could tell that they were successfully mind-wandering, because they pressed the button when that face was upside down.
जल्द ही, हम बता सकते थे कि उनके दिमाग सफलतापूर्वक भटक रहे थे, क्योंकि चेहरा उल्टा होने पर भी वे बटन दबा देते थे।