Scene from 35:00 mm:ss to 35:13 Camille has just said 'goodnight' to Poole and Poole is seen closing doors containing windows from outside the building. The windows from the outside of the building have louvres on the top of the left door and plain glass on the top of the right door. Beneath each panel is another, this time the louvres are bottom right and plain glass bottom left.
The view cuts to inside the building of the same doors. Now, both upper panels have the louvres and both lower panels are plain glass.
Lucas' body has been washed onto the ocean and found the next morning when caught up in a fishing boat's propellers, but the gunshot wounds in his head have dried blood on them that hasn't washed away.
Presumably Camille, as a native (at least as presented) on beach and water matters, has Poole crowded into the bow of the rowboat while she, evidently, is seated extremely close to him, and definitely on the same end with regard to both gravity and buoyancy. Poole has every reason to be apprehensive, at the least.