i remember i once went into a lecture in uni when i hadnt been to sleep for a couple of days, we had to watch a film ( The Battleship Potempkin ) and then write an essay about it, Unfortunately i fell asleep about 30 secs into the film and didn't wake up till the credits rolled, i couldnt get a copy of the film to watch on my own time so i had to write my essay based on a couple of books. Amazingly I managed to get 67% and got the best marks in the class on it