On pages 124-125 Chief goes on a huge rant explaining how back when he was in the army they would fog the airfields when he was in Europe. He uses this as a metaphor similar to the metaphor of the bird hiding in the tree. Chief explains why they used the fog machines in Europe in the army; "We had a whole platoon used to operate fog machines around airfields overseas. Whenever intelligence figured there might be a bombing attack, or if the generals had some secret they wanted to pull-- out of sight, hid so good that even the pies on the base couldnt see what went on-- they fogged the field." Chief uses this as a metaphor for his fog hallucinations that he experiences on the ward. Whenever he feels threatened or nervous or stressed he will have this fog hallucination to try to cover it up and to escape and avoid the threat. He will also do it so that people on the ward, usually big nurse cant see what he is doing. I think it was interesting that Chief reveals the meaning behind his fog hallucinations in this way. He also has the delusion that the ward bought a fog machine from the Army Surplus and installed it in the vents which is obviously not true.