Bear's face bivy
This is a photo Alex took of me on a first ascent of the Bear's Face in Montana. Aside from being a wildly overhanging route, the thing I remember most about this was the iodine. We had to carry all of the water for the route, which we got from a nearby stream and had to treat before drinking. We were using a new system of iodine pellets the size of BB's, and never read the instructions, so we threw a bunch of them in about ten gallons of water and let them sit overnight. Throughout the 3 or so day climb, the water was so "hot" that it burned your gums and nothing, not even coffee, could cut the taste of it. After the climb I almost called the Poison Control Center as I felt so sick, but instead I called Alex and found that he had the same symptoms. It turned out that we had overdosed the iodine by roughly 50x and were only supposed to put one pellet in a liter for a few minutes, not a handful of pellets in a gallon for hours. I was later able to still have kids, so the damage wasn't too long lasting, although it felt like it at the time.