It’s a recurring horror in sci-fi: the hull is pierced, a human is trapped without equipment in an airlock about to open, a door needs to be opened in order to expel something undesirable. With no air and almost zero pressure, the human body isn’t going to last long without some form of protection.
But what does happen, exactly? This article gives you clue of how messed up space is. I guess if you want to look good forever, allow yourself to get sucked out of the Space Shuttle’s airlock.