Capoeira is an Afro-Brazilian blend of martial art, game, and culture created by enslaved Africans in Brazil during the 16th Century. Participants form a roda (circle) and take turns playing instruments, singing, and sparring in pairs in the center of the circle. The game is marked by fluid acrobatic play, feints, subterfuge, and extensive use of groundwork, as well as sweeps, kicks, and headbutts. Throughout the game, a player must avoid a sweep, trip, kick, or head butt that may knock him or her on the floor. Less frequently-used techniques include elbow-strikes, slaps, punches, and body-throws.