Pro-tip for Stage 4- if your body cant make up its mind if its hold or cold and youre sweating, AND youre awake enough to realize it then you can fix the problem by making up its mind for it, by having a hot shower. Presumably a cold shower would work too, but I havent tried it. Yeah a shower will wake you up some, but you werent sleeping anyway, and its better than hovering at stage 4 for fuck knows how long.