Real-life Groundhog Days studied       I thought deja vu was a kind of special feeling. Many people had the experience in their lives before. Sometimes, their heads would show a few parts of memory. They could not remember the impression clearly, but it seemed they knew something before. It was not disease or sickness.             However, sometimes, deja vu would make some trouble for people because wrong memory maybe led to wrong things happened. It was very dangerous. So, if you had deja vu, you must think clearly when you would like to use this idea to do something.