The Matterhorn or Flying Bobs, sometimes known by alternate names such as Musik Express,Terminator or Matterhorn in the UK, 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.