So Ive got the new aluminum MBP and got an incase shell for it. For the first few months I would open my screen and at about 90 degrees it would feel like it was about at the stopping point so I left it there, like the older ones. I recently let a friend use it and not being familiar with the product he forced it a bit further before I could leap across the room and stop him, I heard a bit of a creak and it ended up going all the way back, as far as it would without a case. Everything seems to be in place but it really did sound like something broke, and I couldnt do this before without force. Is this normal?