 CONT: In the elevator escape scene where Hicks gets acid sprayed, he  holds his gun in front of his face and turns his head to the left.  Any acid burns he got would have been to the right side of his face.  As they fight to remove his melting chest armor, there are no acid  marks on his face. When they leave the elevator, there are acid  burns are on the left side of his head, instead of the right side.