The Chemical Brothers are the English electronic duo of Tom Rowlands and Ed Simons, formed in Manchester in 1989 and central to the big beat movement of the 1990s. Tracks like Block Rockin Beats, Hey Boy Hey Girl and Galvanize made their breakbeat heavy sound instantly recognisable in clubs, films and adverts. Short samples of that style now circulate widely on soundboards and in video edits, where a couple of seconds is enough to signal rave energy and 90s dance culture without using a full track.