Bart Simpson: Ah, I wouldn't take it down if I were you. It's a load-bearing poster.
Maybe this explains why the back bedroom floor noticeably slants, and the walls have decorative features like this?
Anyway, the demolition is finished after one day, including the removal of the concrete. Plans have been made to properly shore up the corner of the house, and the project has suddenly become more expensive and kind of scary. However, the prospect of not fixing this problem is even scarier.