I want to ask something about deja-vu: I have experienced it a lot of times. In your article, you mention that a person believes that he has already seen, or heard, or felt something he experiences right now. Like he knows what it's going to happen but he can't say it and when it happnes he thinks "I knew this would happen!" I 've felt this way too, but sometimes I feel that I am actually not only seeing and hearing and feeling things that I have already experienced in the past, but that I am thinking the same things I have thought in the past. As if I am following a similar "train of thought" (I don't know if this is the right expression), while at the same time I am seeing and hearing the same things I think I have seen or heard before. In fact, what amazes me is the connection between what I think and what I see. For example, yesterday, during a lesson in school, I heard the sound of cars from the street outside, and then I thought of a bus, and at the same time one girl from the class stood up and said something while I was thinking this bus and then I said to myself: "This has happened again, a few days ago!" A few seconds after I realise that I am experiencing a deja-vu, it ends. It is not only a picture or a sound, but a very specific combination of many different things, that lasts only for 20-30 seconds. How can this be explained?