This scene is FULL of editing mistakes. Watch Brad Pitt's character as the camera switches angles (from views of Samuel's face back to Tristan's face). When we're looking at Samuel's face, we can see Tristan to the left. He is clearly distraught, holding his face with his hands. Then we cut to a view of Tristan--his hands are nowhere near his face. Then we cut back to a view of Samuel, and Tristan is once again holding his face. Errors like that really bother me, too...