the back seat strapped in with a camera and an imperfect stomach as the shuttle simulator starts to rumble. >> this motion you're feeling right now, if you see the shuttle just minutes before it launches, the engine build, the sequence where they go 10 degrees all the way around and sends the reververberation. >> shakes violently. inside the simulator you can feel it just like the same thing. today on this training mission there is an emergency. >> to the center. >> might be hydraulic. >> and getting worse. >> a leak on high system two. >> two of three li hydraulic systems are leaking. >> watch the leaks that develop. >> down to 36. going to happen fast. >> hydraulic system one is