Red Bull Flugtag (German: 'flight day, airshow') is an event organized by Red Bull in which competitors attempt to fly home-made, human-powered flying machines, size-limited to around 10 metres (33 ft), weight-limited to approximately 150 kilograms (330 lb). The flying machines are usually launched off a pier about 9 metres (30 ft) high into the sea or body of water. Most competitors enter for the entertainment value, and the flying machines rarely fly at all.