Vanishing suddenly

Color legend: Non-dream Dream Lucid Lucid #2??: One Last Handshake I walk down a long hallway to find my dad and my grandfather sitting next to one another at a table next to the top of some stairs. My grandfather passed away over 10 years ago, so I simultaneously feel overjoyed and realize that this is a dream. I say, "I want the chance to shake your hand one more time." He smiles at me. He was in a wheelchair in the years before he died, but now he just stands up and towers over me like he always did. I shake his hand, and hug him. For a moment I have the sensation of hugging him, but soon the visuals vanish into abstract shapes. "I want to ask you just one more question," I say. "Can I do that?" I do not have anything in mind but for some reason I want to do this. "Yes." "What is your favorite memory of your time in World War II?" A map of the world appears. "Was it your time in Okinawa?" Wait, no, he was never in Okinawa. "Or Pearl Harbor?" He was not at Pearl Harbor. As I name each location big red glowing circles surround different spots on the globe. Other spots light up at random too. I become confused about what I want to ask, now, and the moment slips away. Now I am back at the top of the stairs, and my dad and my grandfather have both vanished. I head down the stairs, trying to think of goals or Tasks of the Month. Nothing comes to mind, so I just wander through a long series of rooms that are decorated in fancy, rather frilly, and outdated ways. I run my fingers along the walls as I go, trying to remember to take my time with the dream and not to rush things. I come to a room that looks like a kitchen and there is a girl of about 12 standing here. She is talking to someone, a man that I cannot see. The man says, "[Girl's name]? Is that you? Prince's little sister?" [Prince, as in the singer!] Her: "Yeah, it is me." Him: "But how are you so young? It was years ago when we fell in love..." Her: "Yeah. Is not that creepy?" Him: "No, I remember..." He says something about how she was much older when he knew her. Now I have a false awakening where I am lying on the ground in an empty parking lot next to a building. I am still lucid, though, and nearby I see a door into the building labeled "Tony's Dream Productions!" in fancy script. (This is a reference to Inside Out!) I realize that the man I saw in the previous dream scene is having a nightmare, and I should try to help him out. I mostly think <PERSON> is a DC, but have this strong sense that I should still help. I enter the building and find myself on some kind of soundstage with all of these different facades and bits of fake movie scenery. "<PERSON>!" I shout. "This is a dream! That is not really her!" I keep walking around the soundstage trying to get his attention. Finally I see <PERSON> at the top of a set of metal stairs. "I am dreaming? How do you know?" "Because I am dreaming right now. You are too." I tell him that I am sure everything's fine between him and the girl, and that he was only speaking to a dream character. Soon after I tell him this, the dream ends.