It is sort of a simulator/centrifugue style ride.  Most of the time the deaths are caused by pre-existing problems and they just receive a lot of publicity because it is a Disney park.

Well, there's a reason NASA examines and trains its astronauts extensively before putting them on a shuttle.... So it doesn't quite surprise me that people are having problems on that ride, especially since those people don't know they have anything wrong with them (a lot of times, people don't).... Except that boy; I thought that was just irresponsible to put him on that ride... if he's not big enough to ride a roller coaster with tons of g's, why put him on a ride that simulates a shuttle takeoff?

Joy