Reportedly, there were a number of reasons the first probably originated from the legal office. It was way up in the air, today's guest is dumber then a bucket of rocks and they were concerned about someone falling out. Second, it was very expensive to operate and the load speed was very slow. Third, the lovely guests, don't know the age grouping, were spitting on the crowd below or throwing things out at the crowd below. Anyway they took it out in both DL and WDW at about the same time if I recall correctly.