The (currently useless) Murphy bed glitch

If you leave DeGoulash's room right before the end of the animation of Guybrush pulling down the Murphy bed, the bed will stay down. So you can pick up the book even if you don't have the nails. However, you still need all the nails. Guybrush won't use the crowbar with the bed unless the nails are there. Believe it or not, you even need the last nail.