Forget exploring Mars, what really would have happened to Luke in The Empire Strikes Back when Han cuts open a dead tauntaun and shoves Luke into it to keep him warm? "I always thought they smelled bad on the outside," Han wheezes.
Turns out Han didn't have much time. Luke was already dangerously cold, the tauntaun would have been cooling rapidly, and Han had only 17 to 47 minutes to get him into the "emergency shelter," which we need to assume had some kind of heater.
So Han was a fast shelter-builder. Whatever this great movie needed was worth it!