The Blair Witch/Donner Party/Event Horizon Russian Skiing Trip
In 1959, ten normal, healthy cross-country skiers set off on a camping trip in Russia’s Ural Mountains. Nine never returned. When their bodies were finally found, many elements of eerie mystery hung heavily in the air. Three of the individuals had fallen victim to inexplicable crushing injuries. The tongue of one of the others was missing.
Here is a slideshow describing one of the more-horrifying winter outings of the 20th century. [Via]