A Luge ( /ˈluːʒ/) is a small one- or two-person sled on which one sleds supine (face up) and feet-first. Steering is done by flexing the sled's runners with the calf of each leg or exerting opposite shoulder pressure to the seat. Racing sleds weigh 21-25 kilograms (46-55 lbs.) for singles and 25-30 kilograms (55-66 lbs.) for doubles. Luge is also the name of an Olympic sport. Of the three Olympic sliding sports, which include bobsleigh and skeleton, luge is the fastest and most dangerous. Lugers can reach speeds of 140 km per hour (87 mph). The Guinness World Record is held by Tony Benshoof of the United States who achieved a speed of 139.9 km per hour (86.93 mph). One athlete, Manuel Pfister of Austria, reached a top speed of 154 km per hour (95.69 mph) on the track in Whistler, Canada prior to the 2010 Vancouver Winter Olympics.