what is the center of a trampoline called
Trampoline The fabric that users bounce on (commonly known as the "bounce mat" or "trampoline bed") is not elastic itself; the elasticity is provided by the springs that connect it to the frame, which store potential energy.
Piccadilly Circus Piccadilly Circus is a road junction and public space of London's West End in the City of Westminster. It was built in 1819 to connect Regent Street with Piccadilly. In this context, a circus, from the Latin word meaning "circle", is a round open space at a street junction.[1]