Eye Transplant Doctor's Nazi Germany Hospital

Then I was with RJ Skypala and we were in some old hall or something that had some old art. There was a picture of the guy who first did an eye transplant. RJ started telling me about it and showed me his old lighter that had German on it and opened into a little book that what I gathered explained how the transplant man did it, first starting with a bird and dog eye into a rabbit or something but it didn't work so then he had to insert only a certain part of the eye, not the whole thing, that unlocked it working on all eyes. I tried to read it in German, as instructed by him and his quirkiness and think I actually got more meaning out of it than I thought I would, but then he just told me all this after. Weird old lighter but I liked it. Then he went on about how the doctor entered into nazi germany and had to double as a soldier and I was like transported to his hospital that was now under attack and I was him in the dream.  I had on soldier fatigues at this time, boots and a carbine rifle I was figuring out how to use. Wasn't sure if the bolt action was a semi auto or one shot and how to reload the thing. It had a nice little scope and I'd find out in a bit, shot straight. It was heavy and dark brown wood. We were in the hospital halls that was similar to a high school halls labyrinth with off white painted concrete walls. I could hear an enemy soldier around the bend at the end of the hall so I approached with my gun up and slowly and quietly. I peeked the corner and his back was to me and I shot down the scope. He went down. Then