I'm stumped after triggering that second Olmec head trap. 
 It just remains immovable by one of the pillars while I know below there's a pressure plate that could use some weight.
  
 
  
  
    dont jump to ledge run out of corridor..
  
 
  
  
    Yeah I did that.
 Don't I have to do something about the other pressure plate?
 The head boulder is just sitting there is the face pillar room and I'm unable to move it.
  
 
  
  
    There is a crumbled wall in the corridor. Use that to get on the other side of the rock
  
 
  
  
    There is a crumbled wall in the corridor. Use that to get on the other side of the rock