Rice husks may also be added, since they facilitate burning, and on October 10th spectators may sometimes hear a strange sound as rice shells fall to earth.
為增加空氣、幫助燃燒，炸藥中通常還摻入能保留空隙的稻糠皮，這就是為什麼大部分煙火彈爆裂時，附近觀眾會聽到一陣稻殼撒落聲的原因。