The Matterhorn or Flying Bobs, sometimes known by alternate names such as Musik Express or Terminator, is an amusement ride very similar to the Superbob, which consists of a number of cars attached to axles that swing in and out. The hill and valley shape of the ride causes a pronounced swinging motion: the faster the ride goes, the more dramatic the swinging motion. This ride is commonly seen at a travelling funfairs. Most carnivals and parks require riders to be at least 42 inches or taller.