Dozens of cyclists on Halloween, dressed in their spooky best, haunted the exterior of Gracie Mansion on All Hallow’s Eve to send a message to the mayor to provide more cycling space, especially for crowded East River bridges.

Costumed cyclists from all five boroughs rode to the historic mayoral residence on East 86th Street to call for more pedaling space on New York City’s bridges — specifically the Brooklyn Bridge and Ed Koch-Queensboro Bridge, which they say are dangerously crowded for pedestrians and cyclists.

Organized by Transportation Alternatives’ #Bridges4People campaign, the cyclists gathered with three Councilmembers Ben Kallos (who came dressed as Captain America), Brad Lander (who dressed as The Magician) and Carlos Menchaca (who appeared as himself). All three have been staunch advocates of cyclists in the city and their efforts to make it safer to transverse the city’s bridges.