In the Mummy, it explains how the Mummy was given the ultimate punishment - to be buried alive! When his cask is discovered many years later, there is even scratch marks on the inside. However, throughout the movie, he is searching for his organs that have been removed from his body in order to gain his power back. Could he have had all his internal organs removed, and still be buried alive, scratching at the casket? OOPS! I don't think so.