Did you ever hear of a dead body getting up? There are many such stories in Jewish history, not to mention what is written in the prophets, in our holy sources. The Baal Shem Tov said that every Rabbi whose name is mentioned in the Talmud, had the power to revive the dead. He himself (the Besh"t)is also known to have done it. Also Rabbi Elazar Rokeach revived the trodden to death daughter of the king of Holland who pushed herself between the myriads who came to see him when he arrove the first time in Amsterdam to become the chief Rabbi. In Galicia (area between Poland and Ukraine where many Jews lived) was well known the story about the first Belzer Ruv (Rabbi). He once was on the road and went to pray in a very old synagogue. He was the chazan (saying the prayer of amidah outloud), and we said the blessing "michayei hamaisim" (who revives the dead) he waited for the congregation to respond as usual, "kudoish, kusoish" (holy, holy-a verse the angels say). When they didn't reply he continued, and upon finishing the prayer asked them why they didn't answer. They said that when the Rebbe said "michayei hamaisim" there was a trememdous noise and unexplicable commotion , and they were stunned. He explained that there must be a cementary under the shul, and the buried dead thought that the time has come for them to get up. They checked and found that he was right. (But in the course of hundreds of years Jews had said that blessing there and nothing happened-just apparently when the dead heard it from such a holy Rabbi they thought he was the Moshiach (Messiah)) I know more such stories-another time, with G'd's help. Another amazing phenonomon is the undecayed remnants of Tzadikm who have been buried for a long time. The talmud mentions this, and in all the generations in all the lands where Jews have resided, there are witnesses to this. I know of a few such cases that happened in the not distant past, that there are still people alive who have seen this. Just I don't want to say in public who they are, lest some maniac try do dig them up and see for himself (By the way- a very stern warning- never desecrate the grave of a holy man, the punishment for that comes often quickly and mercilessly. One of many examples-an Arab in Bagdad once got upset about all the honor given to the grave of Rabbi Yosef Chaim- the "ben ish chai". The fool went to grave and started to urinate on it. But he didn't stop-he couldn't move nor stop, until he dropped dead on the place. So respect these very holy places and never do something stupid. Another interesting thing is the tzadikim who dipped themselves in mikveh after passing away. (The purification in mikveh is not obigatory but many do demand it)I heard about this about the Chasam Sofer, Rabbi Yaakov Abuchatzeira, Rebbe David Biderman of Leluv in Jerusalem (this I heard from a friend who heard from a man who was there), and also my wife's great-great grandfather, Chacham Yechezkel Hacohen who came from Yazd, Iran to Tzfat (Safed)Although he is not widely known about, the elderly of Tzfat knew a lot of stories about his holiness.
Another thing is the myriad stories of souls who came to big Rabbis to help them out in the next world. About this I hope to expound another time, with the help of Heaven