I have experienced it twice and have never forgotten either one.
The key is to prepare that it never happens. Once on the rifle on a op and once caught in a storm on Kentucky Lake when a storm set in during the afternoon unexpectedly in march on a fishing trip and stuck on a sandbar in the middle of the lake all evening in the storm and overnight.
First of all be prepared which I was not on the fishing trip. But survived by putting on my life vest on to keep the core heat in my chest. Wrapping my arms with toilet paper and bubble wrap from fishing equipment packaging as well as a $10.00 poncho from WalMart and going onto a fetal position under the poncho in one corner of my boat. The carpet in the boat was the next consideration. But I assure you the delusions, shivering and even passing out is part of it. At one point I was delusional and thought I could swim across the lake about 3/4 of a mile to the Marina which I could see the lights on in the distance. NOT~ But caught my senses by realizing what was happening! Took me two days after it was over to even hold water down! Probably should have been in the hospital. But spent the next two days just keeping warm in the cabin and hydrating and attempting to eat energy foods! So Hypothermia is very real and very dangerous and something everyone should consider and prepare for. Even to have an emergency kit in the car for an unknown situation and especially in cold weather or winter is a must. In my boats today I have a complete emergency kit to prevent it as well as flares, heat blankets, energy snacks, and all. If you have never experienced it I hope and pray you never do! SO prepare NOW!
Good Thread! Maybe it will save someones life someday!