There is a loop, and they either computer generated the rest of the coaster or it's taken from another coaster, because after seeing the movie I can tell you it's easily one of the longest coasters (in time) that I've ever seen. And there is a loop, the train guts caught in in until two people fall out.
And the whole thing with the hydraluic fluid leaking is bullshit, along with the track un-aligning itself and the wheels popping off.
Short story - unrealistic but a good movie