Japanese self-mummification

"Between 1081 and 1903, at least 17 monks managed to mummify themselves. The number may well be higher, however, as it is likely some mummies were never recovered from the alpine tombs." 

They are called sokushinbutsu. They were pretty hardcore: "Incredibly, Tetsumonkai is one of several sokushinbutsu to auto-enucleate—remove one’s own eye—as a charitable act."

Do not try this at home.