Many elements of b-boying can be seen in other antecedent cultures prior to the 1970s. B-boy pioneers Richard "Crazy Legs" Colon and Kenneth "Ken Swift" Gabbert, both of Rock Steady Crew, cite James Brown and Kung Fu films as influences to b-boying. Many of b-boying's acrobatic moves, such as the flare, show clear connections to gymnastics. A young street dancer performing acrobatic headspins was recorded by Thomas Edison in 1898. However, it was not until the 1970s that b-boying developed as a defined dance style in the United States.