I'm having some major issues with the Tomb of Qualopec in the PS2 version. After passing through the initial jumping area, I reach the room with the stone bridge, only to find it's already broken. At first, I didn't realise there was meant to be anything there, so I just jumped across and went straight into the area where the boulder is meant to roll out of. The screen shook and there was a momentary sound of something rolling, but nothing happened, so I just kept following the path until i hit an invisible wall and the game froze. I tried this again a few times to the same effect, so I jumped on to a walkthrough and found out that there was meant to be a bridge and a boulder and all sorts of things happening. So now I'm left with an already broken stone bridge with no sign of a "wooden ledge" that I can move or anything and I'm completely stuck.