Critical Mass Cycling London Olympics Arrests - 84 people been arrested for cycling around London on the opening night of Olympics Game.London police have used pepper spray against a “Critical Mass” cycle ride as the British capital holds the opening ceremony of the 2012 Summer Games.

Critical Mass is a cycling event typically held on the last Friday of every month all around the world. Earlier there have been calls on the Internet to stage the London ride on July 27 as an anti-Olympics protest.