Atelier Zündel Cristea (AZC), Trampoline Bridge The architects speak of the concept of happiness, they want something "fun and frivolous" to combat the "stressful Paris." Their intention is to provide a newer and more playful path across the river Seine. Like ordinary trampolines, however, the concept has serious safety issues and it is currently unclear whether the bridge can ever be installed. Nevertheless, it is an expression of a playful spirit.