Shivering becomes more intense and uncontrollable. Shivering becomes violent. There is a difficulty in speaking. Thinking becomes sluggish and the mind begins to wander. Shivering decreases and muscles begin to stiffen.
Coordination becomes difficult and movements are erratic and jerky.
Exposed skin may become blue or puffy. Thinking becomes fuzzy. Appreciation of the seriousness of the situation is vague or nonexistent. However, the victim may still be able to maintain the appearance of knowing where he is and what is going on. The victim becomes irrational, loses contact with the environment, and drifts into a stupor.