I must agree with the other capoeirista, razors and knives are used in capoeira, however, a suggetion about the dancing and musical aspects of the game was made and I would like just to shed light. Capoeira is in fact a form of a dance but not so much as a means to disguise as it was a form of cultural expression. You see, the african slaves wanted to preserve at least some of their heritage, but they also needed to train for the day the would fight their masters for freedom. So the rythmic movements and the musical influences in capoeira kept them safe from the masters, who though they were just dancing, allowing them to practice an art of fighting while they had a continual reminder of their african culture.
