Yes, your English is very good. To answer your question I'm not sure. I'm not sure about one's real-life body jumping up in real-Life. I can tell you something from experience though. The other day I had a lucid dream where I was in my room. I walked out of my room and into the kitchen. The whole dream world was very dark and I tried willing the lights on, but I'm not so good with dream control yet. I was standing there and I felt overcome with an overwhelming sense of lonliness. I went back into my room and felt better (I guess that says something about how I feel about my room). So that was pretty scary to me.