I've seen this level mentioned in a couple threads, how there's a potential for placing the beastman in such a way as to block passage except for those with acrobat, etc. I don't see it, though. The existing rubble is diagonally on a corner, which I thought you were able to pass through (open route #1). If you stand him next to that rubble to block the straight movement, you also have diagonal passage between him and the opposite corner (route#2). Is there a spot I don't see?
Or are they talking about dropping a crushing block so as to block route #2 between the beastman and the hallway beyond, combined with not actually being able to get through route#1? I guess I have two questions then, one being "where's the cheese?" and one being "Can you move between a rubble and a corner when they join diagonally?"