to run per side at a time, greatly increasing capacity. One of the trains sometimes ran backwards for a few years in the mid-80s. However, until the late 1990s this kind of ride was no longer possible due to the newer ride system in place, as well as different trains. During Fright Fest, the park runs one side backwards using a set of trains acquired from the now demolished Psyclone which was located on the other side of the park. In 2015, the coaster was re-tracked with steel tracking and several inversions were added to the coaster. It was subsequently rebranded "Twisted Colossus". This renovation was completed by Rocky Mountain Construction. Six Flags era In 1979, the park was sold to Six Flags and became known as Six Flags Magic Mountain. In 1981, Six Flags Magic Mountain introduced a ride that was on the west coast for the first time called Roaring Rapids. It was developed by Intamin in conjunction with the now defunct Six Flags Astroworld, which had opened a similar ride in 1979. Along with Rapids came the completion of the midway near Spillikin Corners to link with Revolution's area. Finally, a complete circuit could be made around the park. It was originally designed as a dual-sided station, but only one was fully developed, and all that exists of the possible second side is a few supports. It uses large pumps to circulate water, and each of the two pumps can circulate 88,500 gallons per minute. The reservoir can hold 1.5 million gallons of water, and one of the innovations used on it was the introduction of guide boards to help eliminate jam ups. In 1982, the attraction Freefall was added. Also built by Intamin, it was considered a cutting edge drop tower ride, if not strictly a "roller coaster." It simply ascends the tower and then drops down, with the track curving to horizontal, leaving riders on their backs. Others were built for other parks (some of which are Six Flags). Today, most of these rides are obsolete and have been removed. Some flat rides were added and others removed the next year. In 1984, Sarajevo Bobsleds was erected. Yet another ride built by Intamin, the coaster was basically a bobsled without ice and snow. The coaster was built in honor of the 1984 Olympics. Six Flags Great Adventure added a similar ride that same year. In