Synopsis for those of you too lazy to read the article:

Hiker is climbing a mountain in Utah. Hiker is pinned to the ground by a one-thousand pound boulder that falls on his arm.

Hiker waits patiently to be rescued. It's Saturday.

On Tuesday, hiker runs out of water. On Thursday hiker comes to the conclusion that even if an air rescue crew has been dispatched to find him, they are unlikely to do so given his position beneath the boulder.

Hiker amputates his own right arm with his pocketknife, applies a tourniquette, sets up his gear, and then rappells back down the mountain and hikes out. He is subsequently picked up by a rescue team.