1986, Sarajevo Bobsleds was removed and now operates at Six Flags Over Texas as La Vibora. The other bobsled was moved to Six Flags Great America and later to The Great Escape in Queensbury, New York, where it operates as Alpine Bobsled. In 1985, Children's World was rethemed as Bugs Bunny World, as Magic Mountain had abandoned the Trolls in favor of Warner Bros.' Looney Tunes/Merrie Melodies characters. That year, Michael Jackson visited the park, riding rides such as Colossus, Revolution and Roaring Rapids. In 1986, the park added a steel stand-up looping roller coaster called Shockwave also designed by Intamin. This coaster was located in the back of the park replacing Sarajevo Bobsleds. At the end of 1988, the coaster was removed as part of a ride rotation program and went to Six Flags Great Adventure in 1990. It was removed from there in 1992 and was repainted white and rethemed upon its removal to Six Flags Astroworld. There it was known as Batman The Escape. When Astroworld closed in 2005, the ride would be in storage at Darien Lake, where it remained until 2018 when it was finally sold for scrap. In 1987, the park re-themed the Back Street. Spinning flat rides were renamed Turbo (Electric Rainbow), Subway (Himalaya), and Reactor (Enterprise). The dance club was rethemed as well, and located near Reactor. After Hours, as it was now called (formerly Decibels), for one summer stayed open later than the rest of the park. It, along with Back Street, would stay open an additional two hours as a place for locals to hang out. This format lasted one season. In 1988, Ninja, "The Black Belt of Roller Coasters", opened. Built by Arrow Dynamics, it was the first suspended swing roller coaster on the West coast. Ninja has gone through very few changes since it was opened in 1988; evidently only the wheels and paint have been changed. Tidal Wave opened in 1989. It is a short, wet ride featuring a large boat that travels up a low-angled incline to a level water trough. The trough, in the shape of a semicircle, ends in a steep drop into a large splashpool. The impact displaces large amounts of water on its riders. The ride's exit ramp crosses over the splashpool, allowing willing patrons leaving the ride to get soaked from the splash. In 1990, Viper, a multiple looping coaster designed