I watched Touching the Void last weekend. This is one of the best movies I've ever seen. This movie is the true story of two climbers' experiences while climbing the south face of Siula Grande (a mountain in the Andes). One of the climbers breaks his leg near the top of the mountain. The two are then left to try to get themselves to the bottom alive.
The movie is presented in a documentary/dramatization format. Highly recommended: