Rasputin was once a faith healer called upon to heal the Tsarevich of Russia, who was dying due to complications from hemophilia. Rasputin simply sent a telegram stating that the Tsarevich would not die. The Tsarevich recovered and Rasputin took the credit.
After Rasputin was murdered, a group of people dug up his remains & burned them. As the body was being burned, Rasputin appeared to sit up in the flames, terrifying onlookers. This effect can be attributed to the heat, which caused his tendons to shrink, forcing the body to bend at the waist. Heat contraction could not, however, explain the death threats and screaming.