A revolving door typically consists of three or four doors that hang on a center shaft and rotate around a vertical axis within a cylindrical enclosure. Revolving doors are energy efficient as they prevent drafts, thus preventing increases in the heating or cooling required for the building. At the same time, revolving doors allow large numbers of people to pass in and out.

Around the center shaft of the revolving door, there are usually three or four panels called "wings" or "leaves." Large diameter revolving doors can accommodate strollers and wheeled luggage racks. The tallest revolving door currently is approximately 16 feet (4.9 m) high with 4 wings.

Some "revolving door displays" incorporate a small glass enclosure, permitting small objects such as sculpture, fashion mannequins, or plants to be displayed to pedestrians passing through. Such enclosures can either be mounted at the central pivot, or attached to the revolving door wings.

The wings of revolving doors usually incorporate glass, to allow people to see and anticipate each other while passing through the door. Manual revolving doors rotate with pushbars, causing all wings to rotate. Revolving doors typically have a "speed control" (governor) to prevent people from spinning the doors too fast.

Michael Hazen James McIntyre (born 21 February 1976) is a British stand-up comedian. As well as his stand-up, he has performed on programmes such as Live at the Apollo and has his own programme, Michael McIntyre's Comedy Roadshow.

McIntyre has released two stand-up DVDs; Live and Laughing in 2008 featured material from his first nationwide tour, while Michael McIntyre: Hello Wembley was released in November 2009 following a set at Wembley Arena. The former was the fastest selling debut stand-up DVD ever, and Hello Wembley is the fastest selling stand-up DVD in UK chart history, selling over a million copies. In 2009 McIntyre performed live to half a million people and won Best Live Stand-up at the British Comedy Awards.

In 2010, McIntyre released his autobiography, Life and Laughing: My Story, and also became the youngest-ever host of the Royal Variety Performance. He started as a judge on the fifth series of Britain's Got Talent in April 2011. He is to embark on his second nationwide tour in 2012.

Bernard Charles "Bernie" Ecclestone (born 28 October 1930) is an English business magnate, as president and CEO of Formula One Management and Formula One Administration and through his part-ownership of Alpha Prema, the parent company of the Formula One Group of companies. As such, he is generally considered the primary authority in Formula One racing. He is most commonly addressed in tabloid journalism as "F1 Supremo". His early involvement in the sport was as a competitor and then as a manager of drivers Stuart Lewis-Evans and Jochen Rindt. In 1972, he bought the Brabham team, which he ran for fifteen years. As a team owner he became a member of the Formula One Constructors Association. His control of the sport, which grew from his pioneering the sale of television rights in the late 1970s, is chiefly financial, but under the terms of the Concorde Agreement he and his companies also manage the administration, setup and logistics of each Formula One Grand Prix. Ecclestone himself entered two Grand Prix races during the 1958 season, failing to qualify for either of them.