Just in case something goes wrong with Orion's launch, NASA included a pretty sweet abort system that would, with any luck, bring the crew safely down to Earth. This render shows that ejection is also a very pretty sequence.
The "Launch Abort System" would go into effect when the attached Aries rocket breaks away from the ship, and mostly uses parachutes to guide the crew back down safely. Check out the video, it explains what would ideally happen (if everything before the abort system's triggering goes wrong, of course). [Technology Review via Dvice]