Pinned for five days by 1,000-lb. boulder, 48 hrs. after running out of water and determining he would die if he remained where he was, the 27-year-old hiker used a pocket knife to cut his arm off below the elbow, applied a tourniquet, rappelled 60 ft. to the bottom of the canyon, and was discovered while hiking out. He remained in serious condition at a Grand Junction hospital. NY Times One wonders whether the arm was irreparably injured already; whether he was able to feel pain by the time he did it; indeed, whether it was a rational decision or one made in inanition (and whether there is any point in asking these questions). [thanks, abby]