There are 30 bridges in Paris that cross over the River Seine; they carry cars, trains, cyclists, and pedestrians from the Left Bank to the Right.
Some are very pretty, but they are all somewhat boring. To make getting around the city more fun, French design firm Atelier Zündel Cristea came up with a rather original idea: an inflatable bridge, equipped with enormous trampolines.
The concept was submitted in response to a call for ideas to bring happiness and fun into more architecture. There are obvious reasons it could not be built: It could pop, people could fly off into the water, and it would be an insurance nightmare.