Overload
Does it ever happen that one day you read so much that you reach the limits of your information intake and the overload button in your mind keeps flickering.? And the only thing you could do is to switch of your mind and go off to sleep or plunge into some great music and forget the world around you. Rather than taking any more information, and making those grey cells work any further, just shut the system down and put on some creative/sleeping hat and doze off.