WE've gotten to the large rolling stone with the pressure plate in the tunnel in the Olmec Valley. There's a little alcove on the right as we're facing downward that we need to try to get into. But we cann't get there beforethe stone rolls over us. We've tried running, and rolling, but we can't do it. What else can we do to get by this? any help would be appreciated. Thanks.

Believe me, you can make the run. It's the only way that I know of and as I recall, it only took approx a few tries.

Walk backwards onto the pressure plate, then run forward into the alcolve.