I am stuck in this level. I finished getting the 2nd part of the machine which I don't remember the name and I defeated the lava gardian. I am now on a level called, "Back in Peru". I am in a area where Indy knocked part of a floor and hit a platform and a big, huge bolder is above. Whenever, I get on the platform, I get killed. What should I do there? Am I missing something? What??