Cerny bought the 1957 Routemaster bus in the Netherlands. He attached two huge arms, an electrical engine, and a lot of wiring and suspension tools to make it into a piece he calls "London Booster."
The mechanics inside make the red six-ton bus move up and down on bright-red arms, raising the chassis into various angles. It is accompanied by recordings of a groaning voice and video projections in the windows.
The bus is to be installed today near London housing for the Czech Olympic team.
Cerny says he hopes it will do push-ups through the entire Summer Games.
"There is one common exercise for every sportsman in the world, and that is push-ups," Cerny says. "So I thought the push-ups would be perfect fun. The thing about push-ups is also that, on one hand, it is training for sport activities. But at the same time, it is also punishment in armies or prisons. So push-ups are a very universal kind of movement of proving physical abilities. And that's why I like it. So it is, in a way, very ironic of course."
Cerny's past works have irked the London police as well as European politicians and Russian diplomats.
In 2009, he unveiled a huge puzzlelike installation called "Entropa" at an EU building in Brussels. Depicting European countries in unflattering ways, it marked a dramatic start to the Czech Republic's EU presidency.
Bulgaria protested for being represented as a squat toilet. Germany was a Swastika-like web of highways. France was covered by an "On Strike" banner, while Britain was missing altogether.
In the early 1990s at a London art fair, Cerny put up posters and large replicas of guns, calling on people to observe a "Day of Killing" to control population growth.
In the context of those earlier works, the London bus appears to be much less controversial.