During the first year of public school, your class was paid a visit by a strange man. At first he seemed very friendly, and he spoke cheerfully with your teacher as they assembled a video projector and a large canvas to project upon. Your teacher told the class to "Listen carefully to the nice man" and left the room.
The man instructed you to sit in front of the screen and pay very close attention to the short film. He then put dark goggles over his eyes and heavy headphones over his ears.You heard the projector click on and your eyes grew wide as the screen came to life. The next moment you heard the teacher telling you to hurry and finish your snacks because it was naptime. Your curiosity and confusion about why you couldn't remember what you saw on the screen, or why the strange man seemed to disappear so suddenly, was lost in the sedation of slumber. How long will you nap?