Complex sentence: A corkscrew comes after the tunnel, then an upward turn to the next inversion a zero-G roll, after this inversion the track follows a twisted course until reaching the main brake zone, and then back into the station.
Split into simpler sentences: A corkscrew comes after the tunnel, then an upward turn to the next inversion a zero-G roll. After the inversion the train travels through the rest of the course until reaching the main brake zone, and then back into the station.