girl was thrown from the train because she was seated on the wrong side of the shoulder restraint. After the accident, new safety features were added not only to Great Adventure's roller coasters but also to roller coasters around the world. Once again, Great Adventure set both a bad and later good example for the amusement park world. However, the accident was not good for the park's attendance. Attendance was so low, in fact, that in 1987 rumors began to spread that the park may close in a few years. At the end of that season, the park was slated to get a new multiple looping coaster but by the end of the year, it was decided that Six Flags Great America would get the coaster since Great Adventure was not seen as a good investment. At the end of 1988, the park was about to lose its license to sell food, and attendance was so low park management realized a big new addition was necessary. In the spring of 1988, it was announced that the park would indeed get a new coaster. Sarajevo Bobsleds was removed to make room for the new coaster, The Great American Scream Machine, which opened in April 1989. This coaster had multiple loops and for a month was the tallest roller coaster in the world and brought the park back to five roller coasters. The Scream Machine was removed in 2010 to make room for the new Green Lantern stand-up coaster. In 1990, as part of a ride rotation program, a stand up looping roller coaster called Shockwave was added to the park. Shockwave had previously operated at Six Flags Magic Mountain. However, Ultra Twister was removed at the end of 1989 and sent to Six Flags Astroworld for the 1991 season keeping the park's coaster count at five. In 1991, the park added a huge complex of "dry" waterslides. While guests got wet on them, they could ride these with regular clothes or swimsuits. These slides were themed after the rivers of the world. Roaring Rapids, as well as the second flume ride in the park, were incorporated into this complex. Roaring Rapids became Congo Rapids, and The Hydro Flume became Irrawaddy Riptide. Time Warner era (1990–1997) In 1990, Time Warner acquired a 19.5% stake in Six Flags, then by the end of 1991 acquired an additional 30.5% giving them 50% ownership of