Actually he would fucking die looooong before he or realized that it was "cold" If we put Cap'n Koolaid in deepest darkest region of space with nothing around him it would take him a few thousand years to cool off because radiating heat would dissipate away from his body at a extremely slow rate, seeing as how you are in a vacuum. But once his temp does inevitably go down a bit the ambient temp around him would still be around 2.7 K. Remember, no matter where you go in the cosmos there is ALWAYS the 3 degree microwave background radiation, so there is some semblance "warmth" lol, although im not sure who would call that "warm".
As far as what would happen to him if we pushed his fat ass out of the airlock and into the vacuum of space it would cause no immediate injury, he actually wouldn't explode (ill get into this in a few), his red juice wouldn't boil nor would his red juiciness freeze, none of that. As far as the pressurized exploding things, you have to keep in mind that the fat man's blood cant boil and 'splode because of the containing effects and intricate workings of his jar/skin and seemingly his seemingly circulatory system, which in this case is comprised mostly of ice.
The only shitty thing that would happen immediate would be that he would lose consciousness after a few minutes after the body has drained the supply of oxygen contained his his red syrupy fluid. Then in the event that his jar is exposed to direct sunlight, he would get a very bad sunburn from the parent star's ultraviolet radiation. He's have sunburn, the bends (decompression sickness) and would be long unconscious before he died of O-dep. And yes, he would still be warm for a super long time after he hypothetically died since there is no atmosphere to propel a transfer of heat from his body to the space around him via convection.
But um.... yeah. Carry on.
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