"Fula" is a form of divination using gunpowder. It entails small piles of gunpowder being placed over a board or on the floor. A question is asked and then one of the piles is set alight. If all the piles explode simultaneously, that is taken as an affirmative answer to the question. Another form of divination used in Palo is "vititi mensu". This involves a small mirror, which is places at the opening of a special animal horn, the "mpaka", which is decorated with beadwork. The mirror is then covered with smoke soot and the palero or palera than interprets meanings from the shapes that the soot forms.