I don't know the actual song but it derives from the instruments used for the martial art 'Capoeira'. This is a brazillian martial art formed by slaves, which takes on the appearance of a break-dance. The slaves fashioned musical instruments from anything they could find, so that when guards saw them practising it, it merely looked as though they were dancing. When the time came, the slaves fastened glass, blades and other sharp implements to their toes and used this dance to break out of their cells.
They got their freak on. Proper.